112 lines
2.8 KiB
Plaintext
112 lines
2.8 KiB
Plaintext
$OpenBSD: patch-gcc_config_host-openbsd_c,v 1.2 2008/06/12 01:14:06 kurt Exp $
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--- gcc/config/host-openbsd.c.orig Wed Apr 23 07:42:45 2008
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+++ gcc/config/host-openbsd.c Wed Apr 23 17:57:19 2008
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@@ -0,0 +1,107 @@
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+/* OpenBSD host-specific hook definitions.
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+ Copyright (C) 2005 Free Software Foundation, Inc.
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+
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+ This file is part of GCC.
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+
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+ GCC is free software; you can redistribute it and/or modify it
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+ under the terms of the GNU General Public License as published
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+ by the Free Software Foundation; either version 2, or (at your
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+ option) any later version.
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+
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+ GCC is distributed in the hope that it will be useful, but WITHOUT
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+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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+ License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with GCC; see the file COPYING. If not, write to the
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+ Free Software Foundation, 59 Temple Place - Suite 330, Boston,
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+ MA 02111-1307, USA. */
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+
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+#include <limits.h>
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+#include <unistd.h>
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+
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+#include "config.h"
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+#include "system.h"
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+#include "coretypes.h"
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+#include "hosthooks.h"
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+#include "hosthooks-def.h"
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+
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+#undef HOST_HOOKS_GT_PCH_GET_ADDRESS
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+#define HOST_HOOKS_GT_PCH_GET_ADDRESS openbsd_gt_pch_get_address
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+
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+#undef HOST_HOOKS_GT_PCH_USE_ADDRESS
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+#define HOST_HOOKS_GT_PCH_USE_ADDRESS openbsd_gt_pch_use_address
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+
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+/* Return the address of the PCH address space, if the PCH will fit in it. */
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+
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+void *
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+openbsd_gt_pch_get_address (size_t size, int fd ATTRIBUTE_UNUSED)
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+{
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+ void *base, *addr;
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+ size_t pgsz;
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+
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+ if (size > INT_MAX)
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+ return NULL;
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+
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+ pgsz = sysconf(_SC_PAGESIZE);
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+ if (pgsz == (size_t)-1)
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+ return NULL;
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+
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+ base = sbrk(0);
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+
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+ /* round up to nearest page */
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+ base = (void *)(((long)base + (pgsz - 1)) & ~(pgsz - 1));
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+ if (brk(base) != 0)
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+ return NULL;
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+
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+ /* attempt to allocate size */
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+ addr = sbrk(size);
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+ if (addr == (void *)-1)
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+ return NULL;
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+
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+ /* deallocate the memory */
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+ if (brk(base) != 0)
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+ return NULL;
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+
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+ /* confirm addr is as expected */
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+ if (addr != base)
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+ return NULL;
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+
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+ return base;
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+}
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+
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+/* Return 0 if we can reserve the PCH address space. */
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+
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+int
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+openbsd_gt_pch_use_address (void *base, size_t size, int fd ATTRIBUTE_UNUSED, size_t off ATTRIBUTE_UNUSED)
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+{
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+ void *addr;
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+
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+ if (size == 0)
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+ return -1;
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+
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+ /* sanity check base address */
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+ addr = sbrk(0);
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+ if (addr == (void *)-1 || base < addr)
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+ return -1;
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+
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+ /* set base for sbrk */
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+ if (brk(base) != 0)
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+ return -1;
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+
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+ /* attempt to get the memory */
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+ addr = sbrk(size);
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+ if (addr == (void *)-1)
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+ return -1;
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+
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+ /* sanity check the result */
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+ if (addr != base) {
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+ brk(base);
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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+const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;
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