libgloss/spu/munmap_eaddr.c

   1 /*
   2 (C) Copyright IBM Corp. 2007
   3
   4 All rights reserved.
   5
   6 Redistribution and use in source and binary forms, with or without
   7 modification, are permitted provided that the following conditions are met:
   8
   9 * Redistributions of source code must retain the above copyright notice,
  10 this list of conditions and the following disclaimer.
  11 * Redistributions in binary form must reproduce the above copyright
  12 notice, this list of conditions and the following disclaimer in the
  13 documentation and/or other materials provided with the distribution.
  14 * Neither the name of IBM nor the names of its contributors may be
  15 used to endorse or promote products derived from this software without
  16 specific prior written permission.
  17
  18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28 POSSIBILITY OF SUCH DAMAGE.
  29
  30 */
  31
  32 #include <sys/mman.h>
  33 #include "jsre.h"
  34
  35 typedef struct
  36 {
  37   unsigned long long start;
  38   unsigned int pad0[2];
  39   unsigned int length;
  40   unsigned int pad1[3];
  41 } syscall_munmap_t;
  42
  43 unsigned long long munmap_eaddr(unsigned long long start, size_t length)
  44 {
  45   syscall_munmap_t sys;
  46
  47   sys.start = start;
  48   sys.length = (unsigned int) length;
  49   __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_MUNMAP, &sys);
  50   /*
  51    * Extract 64 bit result from the result stored in sys.
  52    */
  53   return *(unsigned long long *) (&sys);
  54 }