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annotate src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp @ 641:6af0a709d52b

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6812587: Use auxv to determine SPARC hardware features on Solaris Summary: A similar function to getisax(2) should be used to determine all possible instruction set extensions. Reviewed-by: never, kvn
author twisti
date Wed, 11 Mar 2009 14:16:13 -0700
parents a61af66fc99e
children c771b7f43bbf
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1 /*
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2 * Copyright 2006-2009 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_vm_version_solaris_sparc.cpp.incl"
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27
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28 # include <sys/auxv.h>
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29 # include <sys/auxv_SPARC.h>
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30 # include <sys/systeminfo.h>
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31
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32 // We need to keep these here as long as we have to build on Solaris
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33 // versions before 10.
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34 #ifndef SI_ARCHITECTURE_32
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35 #define SI_ARCHITECTURE_32 516 /* basic 32-bit SI_ARCHITECTURE */
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36 #endif
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37
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38 #ifndef SI_ARCHITECTURE_64
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39 #define SI_ARCHITECTURE_64 517 /* basic 64-bit SI_ARCHITECTURE */
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40 #endif
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41
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42 static void do_sysinfo(int si, const char* string, int* features, int mask) {
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43 char tmp;
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44 size_t bufsize = sysinfo(si, &tmp, 1);
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45
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46 // All SI defines used below must be supported.
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47 guarantee(bufsize != -1, "must be supported");
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48
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49 char* buf = (char*) malloc(bufsize);
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50
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51 if (buf == NULL)
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52 return;
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53
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54 if (sysinfo(si, buf, bufsize) == bufsize) {
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55 // Compare the string.
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56 if (strcmp(buf, string) == 0) {
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57 *features |= mask;
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58 }
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59 }
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60
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61 free(buf);
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62 }
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63
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64 int VM_Version::platform_features(int features) {
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65 // getisax(2), SI_ARCHITECTURE_32, and SI_ARCHITECTURE_64 are
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66 // supported on Solaris 10 and later.
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67 if (os::Solaris::supports_getisax()) {
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68 #ifndef PRODUCT
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69 if (PrintMiscellaneous && Verbose)
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70 tty->print_cr("getisax(2) supported.");
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71 #endif
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72
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73 // Check 32-bit architecture.
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74 do_sysinfo(SI_ARCHITECTURE_32, "sparc", &features, v8_instructions_m);
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75
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76 // Check 64-bit architecture.
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77 do_sysinfo(SI_ARCHITECTURE_64, "sparcv9", &features, generic_v9_m);
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78
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79 // Extract valid instruction set extensions.
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80 uint_t av;
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81 uint_t avn = os::Solaris::getisax(&av, 1);
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82 assert(avn == 1, "should only return one av");
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83
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84 if (av & AV_SPARC_MUL32) features |= hardware_mul32_m;
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85 if (av & AV_SPARC_DIV32) features |= hardware_div32_m;
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86 if (av & AV_SPARC_FSMULD) features |= hardware_fsmuld_m;
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87 if (av & AV_SPARC_V8PLUS) features |= v9_instructions_m;
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88 if (av & AV_SPARC_VIS) features |= vis1_instructions_m;
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89 if (av & AV_SPARC_VIS2) features |= vis2_instructions_m;
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90 } else {
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91 // getisax(2) failed, use the old legacy code.
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92 #ifndef PRODUCT
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93 if (PrintMiscellaneous && Verbose)
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94 tty->print_cr("getisax(2) not supported.");
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95 #endif
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96
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97 char tmp;
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98 size_t bufsize = sysinfo(SI_ISALIST, &tmp, 1);
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99 char* buf = (char*) malloc(bufsize);
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100
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101 if (buf != NULL) {
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102 if (sysinfo(SI_ISALIST, buf, bufsize) == bufsize) {
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103 // Figure out what kind of sparc we have
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104 char *sparc_string = strstr(buf, "sparc");
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105 if (sparc_string != NULL) { features |= v8_instructions_m;
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106 if (sparc_string[5] == 'v') {
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107 if (sparc_string[6] == '8') {
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108 if (sparc_string[7] == '-') { features |= hardware_mul32_m;
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109 features |= hardware_div32_m;
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110 } else if (sparc_string[7] == 'p') features |= generic_v9_m;
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111 else features |= generic_v8_m;
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112 } else if (sparc_string[6] == '9') features |= generic_v9_m;
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113 }
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114 }
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115
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116 // Check for visualization instructions
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117 char *vis = strstr(buf, "vis");
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118 if (vis != NULL) { features |= vis1_instructions_m;
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119 if (vis[3] == '2') features |= vis2_instructions_m;
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120 }
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121 }
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122 free(buf);
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123 }
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124 }
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125
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126 // Determine the machine type.
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127 do_sysinfo(SI_MACHINE, "sun4v", &features, sun4v_m);
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128
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129 return features;
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130 }