Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "asm/assembler.inline.hpp"

 #include "assembler_sparc.inline.hpp"

 #include "code/relocInfo.hpp"

 #include "nativeInst_sparc.hpp"

 #include "oops/oop.inline.hpp"

 #include "runtime/safepoint.hpp"

 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {

   NativeInstruction* ip = nativeInstruction_at(addr());

   jint inst = ip->long_at(0);

   assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint");

   switch (Assembler::inv_op(inst)) {

   case Assembler::ldst_op:

     #ifdef ASSERT

       switch (Assembler::inv_op3(inst)) {

         case Assembler::lduw_op3:

         case Assembler::ldub_op3:

         case Assembler::lduh_op3:

         case Assembler::ldd_op3:

         case Assembler::ldsw_op3:

         case Assembler::ldsb_op3:

         case Assembler::ldsh_op3:

         case Assembler::ldx_op3:

         case Assembler::ldf_op3:

         case Assembler::lddf_op3:

         case Assembler::stw_op3:

         case Assembler::stb_op3:

         case Assembler::sth_op3:

         case Assembler::std_op3:

         case Assembler::stx_op3:

         case Assembler::stf_op3:

         case Assembler::stdf_op3:

         case Assembler::casa_op3:

         case Assembler::casxa_op3:

           break;

         default:

           ShouldNotReachHere();

       }

       goto do_non_sethi;

     #endif

   case Assembler::arith_op:

     #ifdef ASSERT

       switch (Assembler::inv_op3(inst)) {

         case Assembler::or_op3:

         case Assembler::add_op3:

         case Assembler::jmpl_op3:

           break;

         default:

           ShouldNotReachHere();

       }

     do_non_sethi:;

     #endif

     {

     guarantee(Assembler::inv_immed(inst), "must have a simm13 field");

     int simm13 = Assembler::low10((intptr_t)x) + o;

     guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13");

     inst &= ~Assembler::simm(    -1, 13);

     inst |=  Assembler::simm(simm13, 13);

     if (verify_only) {

       assert(ip->long_at(0) == inst, "instructions must match");

     } else {

       ip->set_long_at(0, inst);

     }

     }

     break;

   case Assembler::branch_op:

     {

 #ifdef _LP64

     jint inst2;

     guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");

     if (format() != 0) {

       assert(type() == relocInfo::oop_type, "only narrow oops case");

       jint np = oopDesc::encode_heap_oop((oop)x);

       inst &= ~Assembler::hi22(-1);

       inst |=  Assembler::hi22((intptr_t)np);

       if (verify_only) {

         assert(ip->long_at(0) == inst, "instructions must match");

       } else {

         ip->set_long_at(0, inst);

       }

       inst2 = ip->long_at( NativeInstruction::nop_instruction_size );

       guarantee(Assembler::inv_op(inst2)==Assembler::arith_op, "arith op");

       if (verify_only) {

         assert(ip->long_at(NativeInstruction::nop_instruction_size) == NativeInstruction::set_data32_simm13( inst2, (intptr_t)np),

                "instructions must match");

       } else {

         ip->set_long_at(NativeInstruction::nop_instruction_size, NativeInstruction::set_data32_simm13( inst2, (intptr_t)np));

       }

       break;

     }

     if (verify_only) {

       ip->verify_data64_sethi( ip->addr_at(0), (intptr_t)x );

     } else {

       ip->set_data64_sethi( ip->addr_at(0), (intptr_t)x );

     }

 #else

     guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");

     inst &= ~Assembler::hi22(     -1);

     inst |=  Assembler::hi22((intptr_t)x);

     // (ignore offset; it doesn't play into the sethi)

     if (verify_only) {

       assert(ip->long_at(0) == inst, "instructions must match");

     } else {

       ip->set_long_at(0, inst);

     }

 #endif

     }

     break;

   default:

     guarantee(false, "instruction must perform arithmetic or memory access");

   }

 }

 address Relocation::pd_call_destination(address orig_addr) {

   intptr_t adj = 0;

   if (orig_addr != NULL) {

     // We just moved this call instruction from orig_addr to addr().

     // This means its target will appear to have grown by addr() - orig_addr.

     adj = -( addr() - orig_addr );

   }

   if (NativeCall::is_call_at(addr())) {

     NativeCall* call = nativeCall_at(addr());

     return call->destination() + adj;

   }

   if (NativeFarCall::is_call_at(addr())) {

     NativeFarCall* call = nativeFarCall_at(addr());

     return call->destination() + adj;

   }

   // Special case:  Patchable branch local to the code cache.

   // This will break badly if the code cache grows larger than a few Mb.

   NativeGeneralJump* br = nativeGeneralJump_at(addr());

   return br->jump_destination() + adj;

 }

 void Relocation::pd_set_call_destination(address x) {

   if (NativeCall::is_call_at(addr())) {

     NativeCall* call = nativeCall_at(addr());

     call->set_destination(x);

     return;

   }

   if (NativeFarCall::is_call_at(addr())) {

     NativeFarCall* call = nativeFarCall_at(addr());

     call->set_destination(x);

     return;

   }

   // Special case:  Patchable branch local to the code cache.

   // This will break badly if the code cache grows larger than a few Mb.

   NativeGeneralJump* br = nativeGeneralJump_at(addr());

   br->set_jump_destination(x);

 }

 address* Relocation::pd_address_in_code() {

   // SPARC never embeds addresses in code, at present.

   //assert(type() == relocInfo::oop_type, "only oops are inlined at present");

   return (address*)addr();

 }

 address Relocation::pd_get_address_from_code() {

   // SPARC never embeds addresses in code, at present.

   //assert(type() == relocInfo::oop_type, "only oops are inlined at present");

   return *(address*)addr();

 }

 int Relocation::pd_breakpoint_size() {

   // minimum breakpoint size, in short words

   return NativeIllegalInstruction::instruction_size / sizeof(short);

 }

 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) {

   Untested("pd_swap_in_breakpoint");

   // %%% probably do not need a general instrlen; just use the trap size

   if (instrs != NULL) {

     assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data");

     for (int i = 0; i < instrlen; i++) {

       instrs[i] = ((short*)x)[i];

     }

   }

   NativeIllegalInstruction::insert(x);

 }

 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) {

   Untested("pd_swap_out_breakpoint");

   assert(instrlen * sizeof(short) == sizeof(int), "enough buf");

   union { int l; short s[1]; } u;

   for (int i = 0; i < instrlen; i++) {

     u.s[i] = instrs[i];

   }

   NativeInstruction* ni = nativeInstruction_at(x);

   ni->set_long_at(0, u.l);

 }

 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {

 }

 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {

 }