1 /* Solaris host-specific hook definitions.
2 Copyright (C) 2004, 2007, 2008, 2010 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published
8 by the Free Software Foundation; either version 3, or (at your
9 option) any later version.
11 GCC is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
22 #include "coretypes.h"
24 #include "hosthooks.h"
25 #include "hosthooks-def.h"
28 #undef HOST_HOOKS_GT_PCH_GET_ADDRESS
29 #define HOST_HOOKS_GT_PCH_GET_ADDRESS sol_gt_pch_get_address
30 #undef HOST_HOOKS_GT_PCH_USE_ADDRESS
31 #define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address
33 /* Before Solaris 11, the mmap ADDR parameter is mostly ignored without
34 MAP_FIXED set. Before we give up, search the desired address space with
35 mincore to see if the space is really free. */
38 mmap_fixed (void *addr, size_t len, int prot, int flags, int fd, off_t off)
42 base = mmap ((caddr_t) addr, len, prot, flags, fd, off);
46 size_t page_size = getpagesize();
50 if (base != (void *) MAP_FAILED)
51 munmap ((caddr_t) base, len);
54 for (i = 0; i < len; i += page_size)
55 if (mincore ((char *)addr + i, page_size, (char *) &one_byte) == -1
57 continue; /* The page is not mapped. */
62 base = mmap ((caddr_t) addr, len, prot, flags | MAP_FIXED, fd, off);
68 /* For various ports, try to guess a fixed spot in the vm space
69 that's probably free. Based on McDougall, Mauro, Solaris Internals, 2nd
70 ed., p.460-461, fig. 9-3, 9-4, 9-5. */
71 #if defined(__sparcv9__)
72 /* This low to avoid VA hole on UltraSPARC I/II. */
73 # define TRY_EMPTY_VM_SPACE 0x70000000000
74 #elif defined(__sparc__)
75 # define TRY_EMPTY_VM_SPACE 0x80000000
76 #elif defined(__x86_64__)
77 # define TRY_EMPTY_VM_SPACE 0x8000000000000000
78 #elif defined(__i386__)
79 # define TRY_EMPTY_VM_SPACE 0xB0000000
81 # define TRY_EMPTY_VM_SPACE 0
84 /* Determine a location where we might be able to reliably allocate
85 SIZE bytes. FD is the PCH file, though we should return with the
89 sol_gt_pch_get_address (size_t size, int fd)
93 addr = mmap_fixed ((caddr_t) TRY_EMPTY_VM_SPACE, size,
94 PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
96 /* If we failed the map, that means there's *no* free space. */
97 if (addr == (void *) MAP_FAILED)
99 /* Unmap the area before returning. */
100 munmap ((caddr_t) addr, size);
105 /* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at
106 mapping the data at BASE, -1 if we couldn't. */
109 sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset)
113 /* We're called with size == 0 if we're not planning to load a PCH
114 file at all. This allows the hook to free any static space that
115 we might have allocated at link time. */
119 addr = mmap_fixed ((caddr_t) base, size,
120 PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, offset);
122 return addr == base ? 1 : -1;
126 const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;