libc/socket/recv.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   5  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   6  *  Copyright (C) 2010  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   7  *
   8  *  This program is free software: you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation, either version 3 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22
  23 #include <string.h>
  24 #include <sys/socket.h>
  25 #include <_libc.h>
  26
  27 int recv (int fd, char *msg, size_t size, int flags)
  28 {
  29         asm volatile (
  30                 "movl $16, %%eax;"
  31                 "movl %0, %%ecx;"
  32                 "movl %1, %%ebx;"
  33                 "movl %2, %%edx;"
  34                 "int $0x80;" :: "g" (fd), "b" (msg), "g" (size) : "%eax", "%ecx", "%edx", "memory");
  35
  36         errno_update ();
  37
  38         /* get return value */
  39         return (int) *SYSV_RECV;
  40 }
  41