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annotate gcc/config/host-solaris.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
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1 /* Solaris host-specific hook definitions.
131
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2 Copyright (C) 2004-2018 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published
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8 by the Free Software Foundation; either version 3, or (at your
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9 option) any later version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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14 License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "hosthooks.h"
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24 #include "hosthooks-def.h"
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25
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26
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27 #undef HOST_HOOKS_GT_PCH_GET_ADDRESS
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28 #define HOST_HOOKS_GT_PCH_GET_ADDRESS sol_gt_pch_get_address
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29 #undef HOST_HOOKS_GT_PCH_USE_ADDRESS
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30 #define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address
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31
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32 /* Before Solaris 11, the mmap ADDR parameter is mostly ignored without
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33 MAP_FIXED set. Before we give up, search the desired address space with
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34 mincore to see if the space is really free. */
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35
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36 static void *
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37 mmap_fixed (void *addr, size_t len, int prot, int flags, int fd, off_t off)
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38 {
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39 void *base;
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40
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41 base = mmap ((caddr_t) addr, len, prot, flags, fd, off);
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42
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43 if (base != addr)
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44 {
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45 size_t page_size = getpagesize();
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46 char one_byte;
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47 size_t i;
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48
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49 if (base != (void *) MAP_FAILED)
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50 munmap ((caddr_t) base, len);
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51
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52 errno = 0;
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53 for (i = 0; i < len; i += page_size)
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54 if (mincore ((char *)addr + i, page_size, (char *) &one_byte) == -1
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55 && errno == ENOMEM)
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56 continue; /* The page is not mapped. */
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57 else
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58 break;
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59
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60 if (i >= len)
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61 base = mmap ((caddr_t) addr, len, prot, flags | MAP_FIXED, fd, off);
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62 }
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63
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64 return base;
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65 }
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66
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67 /* For various ports, try to guess a fixed spot in the vm space
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68 that's probably free. Based on McDougall, Mauro, Solaris Internals, 2nd
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69 ed., p.460-461, fig. 9-3, 9-4, 9-5. */
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70 #if defined(__sparcv9__)
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71 /* This low to avoid VA hole on UltraSPARC I/II. */
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72 # define TRY_EMPTY_VM_SPACE 0x70000000000
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73 #elif defined(__sparc__)
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74 # define TRY_EMPTY_VM_SPACE 0x80000000
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75 #elif defined(__x86_64__)
111
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76 # define TRY_EMPTY_VM_SPACE 0x80000000000
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77 #elif defined(__i386__)
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78 # define TRY_EMPTY_VM_SPACE 0xB0000000
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79 #else
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80 # define TRY_EMPTY_VM_SPACE 0
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81 #endif
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82
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83 /* Determine a location where we might be able to reliably allocate
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84 SIZE bytes. FD is the PCH file, though we should return with the
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85 file unmapped. */
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86
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87 static void *
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88 sol_gt_pch_get_address (size_t size, int fd)
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89 {
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90 void *addr;
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91
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92 addr = mmap_fixed ((caddr_t) TRY_EMPTY_VM_SPACE, size,
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93 PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
63
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94
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95 /* If we failed the map, that means there's *no* free space. */
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96 if (addr == (void *) MAP_FAILED)
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97 return NULL;
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98 /* Unmap the area before returning. */
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99 munmap ((caddr_t) addr, size);
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100
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101 return addr;
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102 }
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103
0
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104 /* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at
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105 mapping the data at BASE, -1 if we couldn't. */
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106
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107 static int
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108 sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset)
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109 {
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110 void *addr;
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111
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112 /* We're called with size == 0 if we're not planning to load a PCH
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113 file at all. This allows the hook to free any static space that
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114 we might have allocated at link time. */
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115 if (size == 0)
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116 return -1;
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117
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118 addr = mmap_fixed ((caddr_t) base, size,
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119 PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, offset);
0
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120
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121 return addr == base ? 1 : -1;
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122 }
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123
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124
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
125 const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;