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53ee4dac | 1 | /* Solaris host-specific hook definitions. |
f1717362 | 2 | Copyright (C) 2004-2016 Free Software Foundation, Inc. |
53ee4dac | 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 | |
038d1e19 | 8 | by the Free Software Foundation; either version 3, or (at your |
53ee4dac | 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 | |
038d1e19 | 17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
53ee4dac | 19 | |
20 | #include "config.h" | |
21 | #include "system.h" | |
22 | #include "coretypes.h" | |
53ee4dac | 23 | #include "hosthooks.h" |
24 | #include "hosthooks-def.h" | |
25 | ||
26 | ||
edee5220 | 27 | #undef HOST_HOOKS_GT_PCH_GET_ADDRESS |
28 | #define HOST_HOOKS_GT_PCH_GET_ADDRESS sol_gt_pch_get_address | |
53ee4dac | 29 | #undef HOST_HOOKS_GT_PCH_USE_ADDRESS |
30 | #define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address | |
31 | ||
fd1086cf | 32 | /* Before Solaris 11, the mmap ADDR parameter is mostly ignored without |
33 | MAP_FIXED set. Before we give up, search the desired address space with | |
34 | mincore to see if the space is really free. */ | |
35 | ||
36 | static void * | |
37 | mmap_fixed (void *addr, size_t len, int prot, int flags, int fd, off_t off) | |
38 | { | |
39 | void *base; | |
40 | ||
41 | base = mmap ((caddr_t) addr, len, prot, flags, fd, off); | |
42 | ||
43 | if (base != addr) | |
44 | { | |
45 | size_t page_size = getpagesize(); | |
46 | char one_byte; | |
47 | size_t i; | |
48 | ||
49 | if (base != (void *) MAP_FAILED) | |
50 | munmap ((caddr_t) base, len); | |
51 | ||
52 | errno = 0; | |
53 | for (i = 0; i < len; i += page_size) | |
54 | if (mincore ((char *)addr + i, page_size, (char *) &one_byte) == -1 | |
55 | && errno == ENOMEM) | |
56 | continue; /* The page is not mapped. */ | |
57 | else | |
58 | break; | |
59 | ||
60 | if (i >= len) | |
61 | base = mmap ((caddr_t) addr, len, prot, flags | MAP_FIXED, fd, off); | |
62 | } | |
63 | ||
64 | return base; | |
65 | } | |
66 | ||
edee5220 | 67 | /* For various ports, try to guess a fixed spot in the vm space |
68 | that's probably free. Based on McDougall, Mauro, Solaris Internals, 2nd | |
69 | ed., p.460-461, fig. 9-3, 9-4, 9-5. */ | |
70 | #if defined(__sparcv9__) | |
71 | /* This low to avoid VA hole on UltraSPARC I/II. */ | |
72 | # define TRY_EMPTY_VM_SPACE 0x70000000000 | |
73 | #elif defined(__sparc__) | |
74 | # define TRY_EMPTY_VM_SPACE 0x80000000 | |
75 | #elif defined(__x86_64__) | |
14f27bc6 | 76 | # define TRY_EMPTY_VM_SPACE 0x80000000000 |
edee5220 | 77 | #elif defined(__i386__) |
78 | # define TRY_EMPTY_VM_SPACE 0xB0000000 | |
79 | #else | |
80 | # define TRY_EMPTY_VM_SPACE 0 | |
81 | #endif | |
82 | ||
83 | /* Determine a location where we might be able to reliably allocate | |
84 | SIZE bytes. FD is the PCH file, though we should return with the | |
85 | file unmapped. */ | |
86 | ||
87 | static void * | |
88 | sol_gt_pch_get_address (size_t size, int fd) | |
89 | { | |
90 | void *addr; | |
91 | ||
fd1086cf | 92 | addr = mmap_fixed ((caddr_t) TRY_EMPTY_VM_SPACE, size, |
93 | PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); | |
edee5220 | 94 | |
95 | /* If we failed the map, that means there's *no* free space. */ | |
96 | if (addr == (void *) MAP_FAILED) | |
97 | return NULL; | |
98 | /* Unmap the area before returning. */ | |
99 | munmap ((caddr_t) addr, size); | |
100 | ||
101 | return addr; | |
102 | } | |
103 | ||
53ee4dac | 104 | /* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at |
105 | mapping the data at BASE, -1 if we couldn't. */ | |
106 | ||
107 | static int | |
108 | sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset) | |
109 | { | |
110 | void *addr; | |
111 | ||
112 | /* We're called with size == 0 if we're not planning to load a PCH | |
113 | file at all. This allows the hook to free any static space that | |
114 | we might have allocated at link time. */ | |
115 | if (size == 0) | |
116 | return -1; | |
117 | ||
fd1086cf | 118 | addr = mmap_fixed ((caddr_t) base, size, |
119 | PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, offset); | |
53ee4dac | 120 | |
121 | return addr == base ? 1 : -1; | |
122 | } | |
123 | ||
124 | \f | |
125 | const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER; |