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1 | /* Solaris host-specific hook definitions. |
2 | Copyright (C) 2004 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
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 2, or (at your | |
9 | option) any later version. | |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING. If not, write to the | |
18 | Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
19 | MA 02111-1307, USA. */ | |
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include <sys/mman.h> | |
25 | #include "hosthooks.h" | |
26 | #include "hosthooks-def.h" | |
27 | ||
28 | ||
29 | #undef HOST_HOOKS_GT_PCH_USE_ADDRESS | |
30 | #define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address | |
31 | ||
32 | /* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at | |
33 | mapping the data at BASE, -1 if we couldn't. */ | |
34 | ||
35 | static int | |
36 | sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset) | |
37 | { | |
38 | void *addr; | |
39 | ||
40 | /* We're called with size == 0 if we're not planning to load a PCH | |
41 | file at all. This allows the hook to free any static space that | |
42 | we might have allocated at link time. */ | |
43 | if (size == 0) | |
44 | return -1; | |
45 | ||
46 | addr = mmap (base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, | |
47 | fd, offset); | |
48 | ||
49 | /* Solaris isn't good about honoring the mmap START parameter | |
50 | without MAP_FIXED set. Before we give up, search the desired | |
51 | address space with mincore to see if the space is really free. | |
52 | if (addr != base) | |
53 | { | |
54 | size_t page_size = getpagesize(); | |
55 | char one_byte; | |
56 | size_t i; | |
57 | ||
58 | if (addr != (void *) MAP_FAILED) | |
59 | munmap (addr, size); | |
60 | ||
61 | errno = 0; | |
62 | for (i = 0; i < size; i += page_size) | |
63 | if (mincore ((char *)base + i, page_size, (void *)&one_byte) == -1 | |
64 | && errno == ENOMEM) | |
65 | continue; /* The page is not mapped. */ | |
66 | else | |
67 | break; | |
68 | ||
69 | if (i >= size) | |
70 | addr = mmap (base, size, | |
71 | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, | |
72 | fd, offset); | |
73 | } | |
74 | ||
75 | return addr == base ? 1 : -1; | |
76 | } | |
77 | ||
78 | \f | |
79 | const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER; |