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1 /* Copyright (C) 2000, 2001, 2003, 2005, 2009 Free Software Foundation, Inc.
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2 Contributed by Jes Sorensen, <Jes.Sorensen@cern.ch>
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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
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 #include "auto-host.h"
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26
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27 .section .ctors,"aw","progbits"
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28 .align 8
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29 __CTOR_LIST__:
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30 data8 -1
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31
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32 .section .dtors,"aw","progbits"
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33 .align 8
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34 __DTOR_LIST__:
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35 data8 -1
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36
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37 .section .jcr,"aw","progbits"
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38 .align 8
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39 __JCR_LIST__:
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40
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41 .section .sdata
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42 .type dtor_ptr,@object
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43 .size dtor_ptr,8
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44 dtor_ptr:
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45 data8 @gprel(__DTOR_LIST__ + 8)
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46
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47 /* A handle for __cxa_finalize to manage c++ local destructors. */
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48 .global __dso_handle
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49 .type __dso_handle,@object
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50 .size __dso_handle,8
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51 #ifdef SHARED
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52 .section .data
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53 __dso_handle:
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54 data8 __dso_handle
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55 #else
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56 .section .bss
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57 .align 8
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58 __dso_handle:
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59 .skip 8
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60 #endif
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61 .hidden __dso_handle
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62
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63
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64 #ifdef HAVE_INITFINI_ARRAY
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65
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66 .section .fini_array, "a"
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67 data8 @fptr(__do_global_dtors_aux)
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68
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69 .section .init_array, "a"
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70 data8 @fptr(__do_jv_register_classes)
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71 data8 @fptr(__do_global_ctors_aux)
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72
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73 #else /* !HAVE_INITFINI_ARRAY */
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74 /*
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75 * Fragment of the ELF _fini routine that invokes our dtor cleanup.
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76 *
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77 * We make the call by indirection, because in large programs the
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78 * .fini and .init sections are not in range of the destination, and
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79 * we cannot allow the linker to insert a stub at the end of this
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80 * fragment of the _fini function. Further, Itanium does not implement
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81 * the long branch instructions, and we do not wish every program to
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82 * trap to the kernel for emulation.
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83 *
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84 * Note that we require __do_global_dtors_aux to preserve the GP,
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85 * so that the next fragment in .fini gets the right value.
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86 */
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87 .section .fini,"ax","progbits"
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88 { .mlx
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89 movl r2 = @pcrel(__do_global_dtors_aux - 16)
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90 }
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91 { .mii
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92 mov r3 = ip
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93 ;;
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94 add r2 = r2, r3
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95 ;;
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96 }
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97 { .mib
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98 nop 0
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99 mov b6 = r2
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100 br.call.sptk.many b0 = b6
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101 }
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102
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103 /* Likewise for _init. */
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104
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105 .section .init,"ax","progbits"
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106 { .mlx
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107 movl r2 = @pcrel(__do_jv_register_classes - 16)
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108 }
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109 { .mii
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110 mov r3 = ip
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111 ;;
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112 add r2 = r2, r3
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113 ;;
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114 }
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115 { .mib
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116 nop 0
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117 mov b6 = r2
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118 br.call.sptk.many b0 = b6
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119 }
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120 #endif /* !HAVE_INITFINI_ARRAY */
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121
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122 .section .text
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123 .align 32
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124 .proc __do_global_dtors_aux
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125 __do_global_dtors_aux:
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126 .prologue
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127 #ifndef SHARED
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128 .save ar.pfs, r35
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129 alloc loc3 = ar.pfs, 0, 4, 1, 0
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130 addl loc0 = @gprel(dtor_ptr), gp
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131 .save rp, loc1
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132 mov loc1 = rp
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133 .body
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134
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135 mov loc2 = gp
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136 nop 0
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137 br.sptk.many .entry
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138 #else
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139 /*
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140 if (__cxa_finalize)
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141 __cxa_finalize(__dso_handle)
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142 */
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143 .save ar.pfs, r35
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144 alloc loc3 = ar.pfs, 0, 4, 1, 0
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145 addl loc0 = @gprel(dtor_ptr), gp
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146 addl r16 = @ltoff(@fptr(__cxa_finalize)), gp
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147 ;;
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148
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149 ld8 r16 = [r16]
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150 ;;
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151 addl out0 = @ltoff(__dso_handle), gp
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152 cmp.ne p7, p0 = r0, r16
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153 ;;
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154
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155 ld8 out0 = [out0]
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156 (p7) ld8 r18 = [r16], 8
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157 .save rp, loc1
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158 mov loc1 = rp
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159 .body
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160 ;;
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161
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162 mov loc2 = gp
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163 (p7) ld8 gp = [r16]
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164 (p7) mov b6 = r18
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165
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166 nop 0
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167 nop 0
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168 (p7) br.call.sptk.many rp = b6
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169 ;;
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170
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171 nop 0
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172 nop 0
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173 br.sptk.many .entry
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174 #endif
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175 /*
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176 do {
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177 dtor_ptr++;
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178 (*(dtor_ptr-1)) ();
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179 } while (dtor_ptr);
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180 */
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181 .loop:
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182 st8 [loc0] = r15 // update dtor_ptr (in memory)
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183 ld8 r17 = [r16], 8 // r17 <- dtor's entry-point
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184 nop 0
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185 ;;
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186
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187 ld8 gp = [r16] // gp <- dtor's gp
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188 mov b6 = r17
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189 br.call.sptk.many rp = b6
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190
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191 .entry: ld8 r15 = [loc0] // r15 <- dtor_ptr (gp-relative)
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192 ;;
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193 add r16 = r15, loc2 // r16 <- dtor_ptr (absolute)
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194 adds r15 = 8, r15
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195 ;;
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196
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197 ld8 r16 = [r16] // r16 <- pointer to dtor's fdesc
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198 mov rp = loc1
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199 mov ar.pfs = loc3
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200 ;;
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201
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202 cmp.ne p6, p0 = r0, r16
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203 (p6) br.cond.sptk.few .loop
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204 br.ret.sptk.many rp
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205 .endp __do_global_dtors_aux
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206
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207 .align 32
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208 .proc __do_jv_register_classes
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209 __do_jv_register_classes:
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210 .prologue
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211 .save ar.pfs, r33
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212 alloc loc1 = ar.pfs, 0, 3, 1, 0
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213 movl out0 = @gprel(__JCR_LIST__)
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214 ;;
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215
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216 addl r14 = @ltoff(@fptr(_Jv_RegisterClasses)), gp
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217 add out0 = out0, gp
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218 .save rp, loc0
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219 mov loc0 = rp
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220 .body
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221 ;;
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222
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223 ld8 r14 = [r14]
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224 ld8 r15 = [out0]
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225 cmp.ne p6, p0 = r0, r0
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226 ;;
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227
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228 cmp.eq.or p6, p0 = r0, r14
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229 cmp.eq.or p6, p0 = r0, r15
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230 (p6) br.ret.sptk.many rp
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231
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232 ld8 r15 = [r14], 8
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233 ;;
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234 nop 0
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235 mov b6 = r15
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236
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237 mov loc2 = gp
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238 ld8 gp = [r14]
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239 br.call.sptk.many rp = b6
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240 ;;
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241
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242 mov gp = loc2
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243 mov rp = loc0
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244 mov ar.pfs = loc1
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245
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246 nop 0
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247 nop 0
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248 br.ret.sptk.many rp
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249 .endp __do_jv_register_classes
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250
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251 #ifdef SHARED
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252 .weak __cxa_finalize
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253 #endif
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254 .weak _Jv_RegisterClasses
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