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Annotation of ports/patches/patch-gcc_config_host-openbsd_c, Revision 1.1.1.1

1.1       pascal      1: $OpenBSD: patch-gcc_config_host-openbsd_c,v 1.2 2008/06/12 01:14:06 kurt Exp $
                      2: --- gcc/config/host-openbsd.c.orig     Wed Apr 23 07:42:45 2008
                      3: +++ gcc/config/host-openbsd.c  Wed Apr 23 17:57:19 2008
                      4: @@ -0,0 +1,107 @@
                      5: +/* OpenBSD host-specific hook definitions.
                      6: +   Copyright (C) 2005 Free Software Foundation, Inc.
                      7: +
                      8: +   This file is part of GCC.
                      9: +
                     10: +   GCC is free software; you can redistribute it and/or modify it
                     11: +   under the terms of the GNU General Public License as published
                     12: +   by the Free Software Foundation; either version 2, or (at your
                     13: +   option) any later version.
                     14: +
                     15: +   GCC is distributed in the hope that it will be useful, but WITHOUT
                     16: +   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     17: +   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
                     18: +   License for more details.
                     19: +
                     20: +   You should have received a copy of the GNU General Public License
                     21: +   along with GCC; see the file COPYING.  If not, write to the
                     22: +   Free Software Foundation, 59 Temple Place - Suite 330, Boston,
                     23: +   MA 02111-1307, USA.  */
                     24: +
                     25: +#include <limits.h>
                     26: +#include <unistd.h>
                     27: +
                     28: +#include "config.h"
                     29: +#include "system.h"
                     30: +#include "coretypes.h"
                     31: +#include "hosthooks.h"
                     32: +#include "hosthooks-def.h"
                     33: +
                     34: +#undef HOST_HOOKS_GT_PCH_GET_ADDRESS
                     35: +#define HOST_HOOKS_GT_PCH_GET_ADDRESS openbsd_gt_pch_get_address
                     36: +
                     37: +#undef HOST_HOOKS_GT_PCH_USE_ADDRESS
                     38: +#define HOST_HOOKS_GT_PCH_USE_ADDRESS openbsd_gt_pch_use_address
                     39: +
                     40: +/* Return the address of the PCH address space, if the PCH will fit in it.  */
                     41: +
                     42: +void *
                     43: +openbsd_gt_pch_get_address (size_t size, int fd ATTRIBUTE_UNUSED)
                     44: +{
                     45: +  void *base, *addr;
                     46: +  size_t pgsz;
                     47: +
                     48: +  if (size > INT_MAX)
                     49: +          return NULL;
                     50: +
                     51: +  pgsz = sysconf(_SC_PAGESIZE);
                     52: +  if (pgsz == (size_t)-1)
                     53: +    return NULL;
                     54: +
                     55: +  base = sbrk(0);
                     56: +
                     57: +  /* round up to nearest page */
                     58: +  base = (void *)(((long)base + (pgsz - 1)) & ~(pgsz - 1));
                     59: +  if (brk(base) != 0)
                     60: +    return NULL;
                     61: +
                     62: +  /* attempt to allocate size */
                     63: +  addr = sbrk(size);
                     64: +  if (addr == (void *)-1)
                     65: +    return NULL;
                     66: +
                     67: +  /* deallocate the memory */
                     68: +  if (brk(base) != 0)
                     69: +    return NULL;
                     70: +
                     71: +  /* confirm addr is as expected */
                     72: +  if (addr != base)
                     73: +    return NULL;
                     74: +
                     75: +  return base;
                     76: +}
                     77: +
                     78: +/* Return 0 if we can reserve the PCH address space. */
                     79: +
                     80: +int
                     81: +openbsd_gt_pch_use_address (void *base, size_t size, int fd ATTRIBUTE_UNUSED, size_t off ATTRIBUTE_UNUSED)
                     82: +{
                     83: +  void *addr;
                     84: +
                     85: +  if (size == 0)
                     86: +    return -1;
                     87: +
                     88: +  /* sanity check base address */
                     89: +  addr = sbrk(0);
                     90: +  if (addr == (void *)-1 || base < addr)
                     91: +    return -1;
                     92: +
                     93: +  /* set base for sbrk */
                     94: +  if (brk(base) != 0)
                     95: +    return -1;
                     96: +
                     97: +  /* attempt to get the memory */
                     98: +  addr = sbrk(size);
                     99: +  if (addr == (void *)-1)
                    100: +    return -1;
                    101: +
                    102: +  /* sanity check the result */
                    103: +  if (addr != base) {
                    104: +    brk(base);
                    105: +    return -1;
                    106: +  }
                    107: +
                    108: +  return 0;
                    109: +}
                    110: +
                    111: +const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;