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1 /*
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2 * Copyright 1998-2005 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/_relocInfo_sparc.cpp.incl"
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27
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28 void Relocation::pd_set_data_value(address x, intptr_t o) {
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29 NativeInstruction* ip = nativeInstruction_at(addr());
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30 jint inst = ip->long_at(0);
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31 assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint");
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32 switch (Assembler::inv_op(inst)) {
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33
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34 case Assembler::ldst_op:
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35 #ifdef ASSERT
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36 switch (Assembler::inv_op3(inst)) {
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37 case Assembler::lduw_op3:
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38 case Assembler::ldub_op3:
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39 case Assembler::lduh_op3:
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40 case Assembler::ldd_op3:
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41 case Assembler::ldsw_op3:
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42 case Assembler::ldsb_op3:
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43 case Assembler::ldsh_op3:
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44 case Assembler::ldx_op3:
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45 case Assembler::ldf_op3:
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46 case Assembler::lddf_op3:
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47 case Assembler::stw_op3:
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48 case Assembler::stb_op3:
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49 case Assembler::sth_op3:
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50 case Assembler::std_op3:
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51 case Assembler::stx_op3:
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52 case Assembler::stf_op3:
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53 case Assembler::stdf_op3:
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54 case Assembler::casa_op3:
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55 case Assembler::casxa_op3:
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56 break;
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57 default:
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58 ShouldNotReachHere();
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59 }
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60 goto do_non_sethi;
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61 #endif
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62
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63 case Assembler::arith_op:
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64 #ifdef ASSERT
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65 switch (Assembler::inv_op3(inst)) {
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66 case Assembler::or_op3:
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67 case Assembler::add_op3:
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68 case Assembler::jmpl_op3:
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69 break;
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70 default:
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71 ShouldNotReachHere();
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72 }
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73 do_non_sethi:;
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74 #endif
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75 {
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76 guarantee(Assembler::inv_immed(inst), "must have a simm13 field");
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77 int simm13 = Assembler::low10((intptr_t)x) + o;
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78 guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13");
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79 inst &= ~Assembler::simm( -1, 13);
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80 inst |= Assembler::simm(simm13, 13);
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81 ip->set_long_at(0, inst);
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82 }
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83 break;
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84
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85 case Assembler::branch_op:
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86 {
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87 #ifdef _LP64
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88 jint inst2;
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89 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
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90 ip->set_data64_sethi( ip->addr_at(0), (intptr_t)x );
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91 #ifdef COMPILER2
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92 // [RGV] Someone must have missed putting in a reloc entry for the
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93 // add in compiler2.
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94 inst2 = ip->long_at( NativeMovConstReg::add_offset );
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95 guarantee(Assembler::inv_op(inst2)==Assembler::arith_op, "arith op");
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96 ip->set_long_at(NativeMovConstReg::add_offset,ip->set_data32_simm13( inst2, (intptr_t)x+o));
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97 #endif
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98 #else
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99 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
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100 inst &= ~Assembler::hi22( -1);
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101 inst |= Assembler::hi22((intptr_t)x);
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102 // (ignore offset; it doesn't play into the sethi)
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103 ip->set_long_at(0, inst);
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104 #endif
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105 }
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106 break;
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107
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108 default:
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109 guarantee(false, "instruction must perform arithmetic or memory access");
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110 }
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111 }
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112
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113
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114 address Relocation::pd_call_destination(address orig_addr) {
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115 intptr_t adj = 0;
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116 if (orig_addr != NULL) {
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117 // We just moved this call instruction from orig_addr to addr().
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118 // This means its target will appear to have grown by addr() - orig_addr.
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119 adj = -( addr() - orig_addr );
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120 }
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121 if (NativeCall::is_call_at(addr())) {
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122 NativeCall* call = nativeCall_at(addr());
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123 return call->destination() + adj;
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124 }
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125 if (NativeFarCall::is_call_at(addr())) {
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126 NativeFarCall* call = nativeFarCall_at(addr());
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127 return call->destination() + adj;
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128 }
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129 // Special case: Patchable branch local to the code cache.
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130 // This will break badly if the code cache grows larger than a few Mb.
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131 NativeGeneralJump* br = nativeGeneralJump_at(addr());
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132 return br->jump_destination() + adj;
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133 }
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134
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135
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136 void Relocation::pd_set_call_destination(address x) {
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137 if (NativeCall::is_call_at(addr())) {
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138 NativeCall* call = nativeCall_at(addr());
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139 call->set_destination(x);
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140 return;
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141 }
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142 if (NativeFarCall::is_call_at(addr())) {
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143 NativeFarCall* call = nativeFarCall_at(addr());
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144 call->set_destination(x);
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145 return;
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146 }
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147 // Special case: Patchable branch local to the code cache.
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148 // This will break badly if the code cache grows larger than a few Mb.
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149 NativeGeneralJump* br = nativeGeneralJump_at(addr());
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150 br->set_jump_destination(x);
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151 }
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152
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153
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154 address* Relocation::pd_address_in_code() {
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155 // SPARC never embeds addresses in code, at present.
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156 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
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157 return (address*)addr();
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158 }
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159
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160
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161 address Relocation::pd_get_address_from_code() {
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162 // SPARC never embeds addresses in code, at present.
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163 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
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164 return *(address*)addr();
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165 }
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166
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167
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168 int Relocation::pd_breakpoint_size() {
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169 // minimum breakpoint size, in short words
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170 return NativeIllegalInstruction::instruction_size / sizeof(short);
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171 }
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172
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173 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) {
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174 Untested("pd_swap_in_breakpoint");
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175 // %%% probably do not need a general instrlen; just use the trap size
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176 if (instrs != NULL) {
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177 assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data");
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178 for (int i = 0; i < instrlen; i++) {
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179 instrs[i] = ((short*)x)[i];
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180 }
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181 }
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182 NativeIllegalInstruction::insert(x);
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183 }
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184
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185
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186 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) {
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187 Untested("pd_swap_out_breakpoint");
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188 assert(instrlen * sizeof(short) == sizeof(int), "enough buf");
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189 union { int l; short s[1]; } u;
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190 for (int i = 0; i < instrlen; i++) {
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191 u.s[i] = instrs[i];
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192 }
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193 NativeInstruction* ni = nativeInstruction_at(x);
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194 ni->set_long_at(0, u.l);
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195 }
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