1 #ifdef USE_PRAGMA_IDENT_SRC
   2 #pragma ident "@(#)relocInfo_sparc.cpp  1.31 07/05/05 17:04:31 JVM"
   3 #endif
   4 /*
   5  * Copyright 1998-2005 Sun Microsystems, Inc.  All Rights Reserved.
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This code is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 only, as
  10  * published by the Free Software Foundation.
  11  *
  12  * This code is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * version 2 for more details (a copy is included in the LICENSE file that
  16  * accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License version
  19  * 2 along with this work; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *  
  26  */
  27 
  28 # include "incls/_precompiled.incl"
  29 # include "incls/_relocInfo_sparc.cpp.incl"
  30 
  31 void Relocation::pd_set_data_value(address x, intptr_t o) {
  32   NativeInstruction* ip = nativeInstruction_at(addr());
  33   jint inst = ip->long_at(0);
  34   assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint");
  35   switch (Assembler::inv_op(inst)) {
  36 
  37   case Assembler::ldst_op:
  38     #ifdef ASSERT
  39       switch (Assembler::inv_op3(inst)) {
  40         case Assembler::lduw_op3:
  41         case Assembler::ldub_op3:
  42         case Assembler::lduh_op3:
  43         case Assembler::ldd_op3:
  44         case Assembler::ldsw_op3:
  45         case Assembler::ldsb_op3:
  46         case Assembler::ldsh_op3:
  47         case Assembler::ldx_op3:
  48         case Assembler::ldf_op3:
  49         case Assembler::lddf_op3:
  50         case Assembler::stw_op3:
  51         case Assembler::stb_op3:
  52         case Assembler::sth_op3:
  53         case Assembler::std_op3:
  54         case Assembler::stx_op3:
  55         case Assembler::stf_op3:
  56         case Assembler::stdf_op3:
  57         case Assembler::casa_op3:
  58         case Assembler::casxa_op3:
  59           break;
  60         default:
  61           ShouldNotReachHere();
  62       }
  63       goto do_non_sethi;
  64     #endif
  65 
  66   case Assembler::arith_op:
  67     #ifdef ASSERT
  68       switch (Assembler::inv_op3(inst)) {
  69         case Assembler::or_op3:
  70         case Assembler::add_op3:
  71         case Assembler::jmpl_op3:
  72           break;
  73         default:
  74           ShouldNotReachHere();
  75       }
  76     do_non_sethi:;
  77     #endif
  78     {
  79     guarantee(Assembler::inv_immed(inst), "must have a simm13 field");
  80     int simm13 = Assembler::low10((intptr_t)x) + o;
  81     guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13");
  82     inst &= ~Assembler::simm(    -1, 13);
  83     inst |=  Assembler::simm(simm13, 13);
  84     ip->set_long_at(0, inst);
  85     }
  86     break;
  87 
  88   case Assembler::branch_op:
  89     {
  90 #ifdef _LP64
  91     jint inst2;
  92     guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
  93     ip->set_data64_sethi( ip->addr_at(0), (intptr_t)x ); 
  94 #ifdef COMPILER2
  95     // [RGV] Someone must have missed putting in a reloc entry for the
  96     // add in compiler2.
  97     inst2 = ip->long_at( NativeMovConstReg::add_offset );
  98     guarantee(Assembler::inv_op(inst2)==Assembler::arith_op, "arith op");
  99     ip->set_long_at(NativeMovConstReg::add_offset,ip->set_data32_simm13( inst2, (intptr_t)x+o));
 100 #endif
 101 #else
 102     guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
 103     inst &= ~Assembler::hi22(     -1);
 104     inst |=  Assembler::hi22((intptr_t)x);
 105     // (ignore offset; it doesn't play into the sethi)
 106     ip->set_long_at(0, inst);
 107 #endif
 108     }
 109     break;
 110 
 111   default:
 112     guarantee(false, "instruction must perform arithmetic or memory access");
 113   }
 114 }
 115 
 116 
 117 address Relocation::pd_call_destination(address orig_addr) {
 118   intptr_t adj = 0;
 119   if (orig_addr != NULL) {
 120     // We just moved this call instruction from orig_addr to addr().
 121     // This means its target will appear to have grown by addr() - orig_addr.
 122     adj = -( addr() - orig_addr );
 123   }
 124   if (NativeCall::is_call_at(addr())) {
 125     NativeCall* call = nativeCall_at(addr());
 126     return call->destination() + adj;
 127   }
 128   if (NativeFarCall::is_call_at(addr())) {
 129     NativeFarCall* call = nativeFarCall_at(addr());
 130     return call->destination() + adj;
 131   }
 132   // Special case:  Patchable branch local to the code cache.
 133   // This will break badly if the code cache grows larger than a few Mb.
 134   NativeGeneralJump* br = nativeGeneralJump_at(addr());
 135   return br->jump_destination() + adj;
 136 }
 137 
 138 
 139 void Relocation::pd_set_call_destination(address x) {
 140   if (NativeCall::is_call_at(addr())) {
 141     NativeCall* call = nativeCall_at(addr());
 142     call->set_destination(x);
 143     return;
 144   }
 145   if (NativeFarCall::is_call_at(addr())) {
 146     NativeFarCall* call = nativeFarCall_at(addr());
 147     call->set_destination(x);
 148     return;
 149   }
 150   // Special case:  Patchable branch local to the code cache.
 151   // This will break badly if the code cache grows larger than a few Mb.
 152   NativeGeneralJump* br = nativeGeneralJump_at(addr());
 153   br->set_jump_destination(x);
 154 }
 155 
 156 
 157 address* Relocation::pd_address_in_code() {
 158   // SPARC never embeds addresses in code, at present.
 159   //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
 160   return (address*)addr();
 161 }
 162 
 163 
 164 address Relocation::pd_get_address_from_code() {
 165   // SPARC never embeds addresses in code, at present.
 166   //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
 167   return *(address*)addr();
 168 }
 169 
 170 
 171 int Relocation::pd_breakpoint_size() {
 172   // minimum breakpoint size, in short words
 173   return NativeIllegalInstruction::instruction_size / sizeof(short);
 174 }
 175 
 176 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) {
 177   Untested("pd_swap_in_breakpoint");
 178   // %%% probably do not need a general instrlen; just use the trap size
 179   if (instrs != NULL) {
 180     assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data");
 181     for (int i = 0; i < instrlen; i++) {
 182       instrs[i] = ((short*)x)[i];
 183     }
 184   }
 185   NativeIllegalInstruction::insert(x);
 186 }
 187 
 188 
 189 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) {
 190   Untested("pd_swap_out_breakpoint");
 191   assert(instrlen * sizeof(short) == sizeof(int), "enough buf");
 192   union { int l; short s[1]; } u;
 193   for (int i = 0; i < instrlen; i++) {
 194     u.s[i] = instrs[i];
 195   }
 196   NativeInstruction* ni = nativeInstruction_at(x);
 197   ni->set_long_at(0, u.l);
 198 }