libpthread/create.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <pthread.h>
  21
  22
  23 int pthread_create (pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg)
  24 {
  25         unsigned *memptr = (unsigned *) 0x9050;
  26         *memptr = (unsigned) arg;
  27
  28         asm volatile (
  29                 "movl $50, %%eax;"
  30                 "movl %0, %%ebx;"
  31                 "int $0x80;" :: "b" (start_routine) : "%eax", "memory");
  32
  33         unsigned *ret = memptr;
  34
  35         if (!ret)
  36                 return -1;
  37
  38         thread->start_routine = start_routine;
  39         thread->arg = arg;
  40         thread->attr = (pthread_attr_t *) attr;
  41
  42         if (*ret == 1)
  43                 return 0;
  44
  45         return -1;
  46 }