jdk8-mips64-public/hotspot: src/cpu/x86/vm/nativeInst

src/cpu/x86/vm/nativeInst_x86.hpp@437d03ea40b1 (annotated)

src/cpu/x86/vm/nativeInst_x86.hpp

Wed, 21 May 2008 16:31:35 -0700

author: kvn
date: Wed, 21 May 2008 16:31:35 -0700
changeset 600: 437d03ea40b1
parent 551: 018d5b58dd4f
child 631: d1605aabd0a1
permissions: -rw-r--r--

6703888: Compressed Oops: use the 32-bits gap after klass in a object
Summary: Use the gap also for a narrow oop field and a boxing object value.
Reviewed-by: coleenp, never

 /*
  * Copyright 1997-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 // We have interfaces for the following instructions:
 // - NativeInstruction
 // - - NativeCall
 // - - NativeMovConstReg
 // - - NativeMovConstRegPatching
 // - - NativeMovRegMem
 // - - NativeMovRegMemPatching
 // - - NativeJump
 // - - NativeIllegalOpCode
 // - - NativeGeneralJump
 // - - NativeReturn
 // - - NativeReturnX (return with argument)
 // - - NativePushConst
 // - - NativeTstRegMem
 // The base class for different kinds of native instruction abstractions.
 // Provides the primitive operations to manipulate code relative to this.
 class NativeInstruction VALUE_OBJ_CLASS_SPEC {
   friend class Relocation;
  public:
   enum Intel_specific_constants {
     nop_instruction_code        = 0x90,
     nop_instruction_size        =    1
   };
   bool is_nop()                        { return ubyte_at(0) == nop_instruction_code; }
   bool is_dtrace_trap();
   inline bool is_call();
   inline bool is_illegal();
   inline bool is_return();
   inline bool is_jump();
   inline bool is_cond_jump();
   inline bool is_safepoint_poll();
   inline bool is_mov_literal64();
  protected:
   address addr_at(int offset) const    { return address(this) + offset; }
   s_char sbyte_at(int offset) const    { return *(s_char*) addr_at(offset); }
   u_char ubyte_at(int offset) const    { return *(u_char*) addr_at(offset); }
   jint int_at(int offset) const         { return *(jint*) addr_at(offset); }
   intptr_t ptr_at(int offset) const    { return *(intptr_t*) addr_at(offset); }
   oop  oop_at (int offset) const       { return *(oop*) addr_at(offset); }
   void set_char_at(int offset, char c)        { *addr_at(offset) = (u_char)c; wrote(offset); }
   void set_int_at(int offset, jint  i)        { *(jint*)addr_at(offset) = i;  wrote(offset); }
   void set_ptr_at (int offset, intptr_t  ptr) { *(intptr_t*) addr_at(offset) = ptr;  wrote(offset); }
   void set_oop_at (int offset, oop  o)        { *(oop*) addr_at(offset) = o;  wrote(offset); }
   // This doesn't really do anything on Intel, but it is the place where
   // cache invalidation belongs, generically:
   void wrote(int offset);
  public:
   // unit test stuff
   static void test() {}                 // override for testing
   inline friend NativeInstruction* nativeInstruction_at(address address);
 };
 inline NativeInstruction* nativeInstruction_at(address address) {
   NativeInstruction* inst = (NativeInstruction*)address;
 #ifdef ASSERT
   //inst->verify();
 #endif
   return inst;
 }
 inline NativeCall* nativeCall_at(address address);
 // The NativeCall is an abstraction for accessing/manipulating native call imm32/rel32off
 // instructions (used to manipulate inline caches, primitive & dll calls, etc.).
 class NativeCall: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code            = 0xE8,
     instruction_size            =    5,
     instruction_offset          =    0,
     displacement_offset         =    1,
     return_address_offset       =    5
   };
   enum { cache_line_size = BytesPerWord };  // conservative estimate!
   address instruction_address() const       { return addr_at(instruction_offset); }
   address next_instruction_address() const  { return addr_at(return_address_offset); }
   int   displacement() const                { return (jint) int_at(displacement_offset); }
   address displacement_address() const      { return addr_at(displacement_offset); }
   address return_address() const            { return addr_at(return_address_offset); }
   address destination() const;
   void  set_destination(address dest)       {
 #ifdef AMD64
     assert((labs((intptr_t) dest - (intptr_t) return_address())  &
 xFFFFFFFF00000000) == 0,
            "must be 32bit offset");
 #endif // AMD64
     set_int_at(displacement_offset, dest - return_address());
   }
   void  set_destination_mt_safe(address dest);
   void  verify_alignment() { assert((intptr_t)addr_at(displacement_offset) % BytesPerInt == 0, "must be aligned"); }
   void  verify();
   void  print();
   // Creation
   inline friend NativeCall* nativeCall_at(address address);
   inline friend NativeCall* nativeCall_before(address return_address);
   static bool is_call_at(address instr) {
     return ((*instr) & 0xFF) == NativeCall::instruction_code;
   }
   static bool is_call_before(address return_address) {
     return is_call_at(return_address - NativeCall::return_address_offset);
   }
   static bool is_call_to(address instr, address target) {
     return nativeInstruction_at(instr)->is_call() &&
       nativeCall_at(instr)->destination() == target;
   }
   // MT-safe patching of a call instruction.
   static void insert(address code_pos, address entry);
   static void replace_mt_safe(address instr_addr, address code_buffer);
 };
 inline NativeCall* nativeCall_at(address address) {
   NativeCall* call = (NativeCall*)(address - NativeCall::instruction_offset);
 #ifdef ASSERT
   call->verify();
 #endif
   return call;
 }
 inline NativeCall* nativeCall_before(address return_address) {
   NativeCall* call = (NativeCall*)(return_address - NativeCall::return_address_offset);
 #ifdef ASSERT
   call->verify();
 #endif
   return call;
 }
 // An interface for accessing/manipulating native mov reg, imm32 instructions.
 // (used to manipulate inlined 32bit data dll calls, etc.)
 class NativeMovConstReg: public NativeInstruction {
 #ifdef AMD64
   static const bool has_rex = true;
   static const int rex_size = 1;
 #else
   static const bool has_rex = false;
   static const int rex_size = 0;
 #endif // AMD64
  public:
   enum Intel_specific_constants {
     instruction_code            = 0xB8,
     instruction_size            =    1 + rex_size + wordSize,
     instruction_offset          =    0,
     data_offset                 =    1 + rex_size,
     next_instruction_offset     =    instruction_size,
     register_mask               = 0x07
   };
   address instruction_address() const       { return addr_at(instruction_offset); }
   address next_instruction_address() const  { return addr_at(next_instruction_offset); }
   intptr_t data() const                     { return ptr_at(data_offset); }
   void  set_data(intptr_t x)                { set_ptr_at(data_offset, x); }
   void  verify();
   void  print();
   // unit test stuff
   static void test() {}
   // Creation
   inline friend NativeMovConstReg* nativeMovConstReg_at(address address);
   inline friend NativeMovConstReg* nativeMovConstReg_before(address address);
 };
 inline NativeMovConstReg* nativeMovConstReg_at(address address) {
   NativeMovConstReg* test = (NativeMovConstReg*)(address - NativeMovConstReg::instruction_offset);
 #ifdef ASSERT
   test->verify();
 #endif
   return test;
 }
 inline NativeMovConstReg* nativeMovConstReg_before(address address) {
   NativeMovConstReg* test = (NativeMovConstReg*)(address - NativeMovConstReg::instruction_size - NativeMovConstReg::instruction_offset);
 #ifdef ASSERT
   test->verify();
 #endif
   return test;
 }
 class NativeMovConstRegPatching: public NativeMovConstReg {
  private:
     friend NativeMovConstRegPatching* nativeMovConstRegPatching_at(address address) {
     NativeMovConstRegPatching* test = (NativeMovConstRegPatching*)(address - instruction_offset);
     #ifdef ASSERT
       test->verify();
     #endif
     return test;
   }
 };
 #ifndef AMD64
 // An interface for accessing/manipulating native moves of the form:
 //      mov[b/w/l] [reg + offset], reg   (instruction_code_reg2mem)
 //      mov[b/w/l] reg, [reg+offset]     (instruction_code_mem2reg
 //      mov[s/z]x[w/b] [reg + offset], reg
 //      fld_s  [reg+offset]
 //      fld_d  [reg+offset]
 //      fstp_s [reg + offset]
 //      fstp_d [reg + offset]
 //
 // Warning: These routines must be able to handle any instruction sequences
 // that are generated as a result of the load/store byte,word,long
 // macros.  For example: The load_unsigned_byte instruction generates
 // an xor reg,reg inst prior to generating the movb instruction.  This
 // class must skip the xor instruction.
 class NativeMovRegMem: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code_xor                = 0x33,
     instruction_extended_prefix         = 0x0F,
     instruction_code_mem2reg_movzxb     = 0xB6,
     instruction_code_mem2reg_movsxb     = 0xBE,
     instruction_code_mem2reg_movzxw     = 0xB7,
     instruction_code_mem2reg_movsxw     = 0xBF,
     instruction_operandsize_prefix      = 0x66,
     instruction_code_reg2meml           = 0x89,
     instruction_code_mem2regl           = 0x8b,
     instruction_code_reg2memb           = 0x88,
     instruction_code_mem2regb           = 0x8a,
     instruction_code_float_s            = 0xd9,
     instruction_code_float_d            = 0xdd,
     instruction_code_long_volatile      = 0xdf,
     instruction_code_xmm_ss_prefix      = 0xf3,
     instruction_code_xmm_sd_prefix      = 0xf2,
     instruction_code_xmm_code           = 0x0f,
     instruction_code_xmm_load           = 0x10,
     instruction_code_xmm_store          = 0x11,
     instruction_code_xmm_lpd            = 0x12,
     instruction_size                    = 4,
     instruction_offset                  = 0,
     data_offset                         = 2,
     next_instruction_offset             = 4
   };
   address instruction_address() const {
     if (*addr_at(instruction_offset)   == instruction_operandsize_prefix &&
         *addr_at(instruction_offset+1) != instruction_code_xmm_code) {
       return addr_at(instruction_offset+1); // Not SSE instructions
     }
     else if (*addr_at(instruction_offset) == instruction_extended_prefix) {
       return addr_at(instruction_offset+1);
     }
     else if (*addr_at(instruction_offset) == instruction_code_xor) {
       return addr_at(instruction_offset+2);
     }
     else return addr_at(instruction_offset);
   }
   address next_instruction_address() const {
     switch (*addr_at(instruction_offset)) {
     case instruction_operandsize_prefix:
       if (*addr_at(instruction_offset+1) == instruction_code_xmm_code)
         return instruction_address() + instruction_size; // SSE instructions
     case instruction_extended_prefix:
       return instruction_address() + instruction_size + 1;
     case instruction_code_reg2meml:
     case instruction_code_mem2regl:
     case instruction_code_reg2memb:
     case instruction_code_mem2regb:
     case instruction_code_xor:
       return instruction_address() + instruction_size + 2;
     default:
       return instruction_address() + instruction_size;
     }
   }
   int   offset() const{
     if (*addr_at(instruction_offset)   == instruction_operandsize_prefix &&
         *addr_at(instruction_offset+1) != instruction_code_xmm_code) {
       return int_at(data_offset+1); // Not SSE instructions
     }
     else if (*addr_at(instruction_offset) == instruction_extended_prefix) {
       return int_at(data_offset+1);
     }
     else if (*addr_at(instruction_offset) == instruction_code_xor ||
              *addr_at(instruction_offset) == instruction_code_xmm_ss_prefix ||
              *addr_at(instruction_offset) == instruction_code_xmm_sd_prefix ||
              *addr_at(instruction_offset) == instruction_operandsize_prefix) {
       return int_at(data_offset+2);
     }
     else return int_at(data_offset);
   }
   void  set_offset(int x) {
     if (*addr_at(instruction_offset)   == instruction_operandsize_prefix &&
         *addr_at(instruction_offset+1) != instruction_code_xmm_code) {
       set_int_at(data_offset+1, x); // Not SSE instructions
     }
     else if (*addr_at(instruction_offset) == instruction_extended_prefix) {
       set_int_at(data_offset+1, x);
     }
     else if (*addr_at(instruction_offset) == instruction_code_xor ||
              *addr_at(instruction_offset) == instruction_code_xmm_ss_prefix ||
              *addr_at(instruction_offset) == instruction_code_xmm_sd_prefix ||
              *addr_at(instruction_offset) == instruction_operandsize_prefix) {
       set_int_at(data_offset+2, x);
     }
     else set_int_at(data_offset, x);
   }
   void  add_offset_in_bytes(int add_offset)     { set_offset ( ( offset() + add_offset ) ); }
   void  copy_instruction_to(address new_instruction_address);
   void verify();
   void print ();
   // unit test stuff
   static void test() {}
  private:
   inline friend NativeMovRegMem* nativeMovRegMem_at (address address);
 };
 inline NativeMovRegMem* nativeMovRegMem_at (address address) {
   NativeMovRegMem* test = (NativeMovRegMem*)(address - NativeMovRegMem::instruction_offset);
 #ifdef ASSERT
   test->verify();
 #endif
   return test;
 }
 class NativeMovRegMemPatching: public NativeMovRegMem {
  private:
   friend NativeMovRegMemPatching* nativeMovRegMemPatching_at (address address) {
     NativeMovRegMemPatching* test = (NativeMovRegMemPatching*)(address - instruction_offset);
     #ifdef ASSERT
       test->verify();
     #endif
     return test;
   }
 };
 // An interface for accessing/manipulating native leal instruction of form:
 //        leal reg, [reg + offset]
 class NativeLoadAddress: public NativeMovRegMem {
  public:
   enum Intel_specific_constants {
     instruction_code            = 0x8D
   };
   void verify();
   void print ();
   // unit test stuff
   static void test() {}
  private:
   friend NativeLoadAddress* nativeLoadAddress_at (address address) {
     NativeLoadAddress* test = (NativeLoadAddress*)(address - instruction_offset);
     #ifdef ASSERT
       test->verify();
     #endif
     return test;
   }
 };
 #endif // AMD64
 // jump rel32off
 class NativeJump: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code            = 0xe9,
     instruction_size            =    5,
     instruction_offset          =    0,
     data_offset                 =    1,
     next_instruction_offset     =    5
   };
   address instruction_address() const       { return addr_at(instruction_offset); }
   address next_instruction_address() const  { return addr_at(next_instruction_offset); }
   address jump_destination() const          {
      address dest = (int_at(data_offset)+next_instruction_address());
 #ifdef AMD64 // What is this about?
      // return -1 if jump to self
     dest = (dest == (address) this) ? (address) -1 : dest;
 #endif // AMD64
     return dest;
   }
   void  set_jump_destination(address dest)  {
     intptr_t val = dest - next_instruction_address();
 #ifdef AMD64
     if (dest == (address) -1) { // can't encode jump to -1
       val = -5; // jump to self
     } else {
       assert((labs(val)  & 0xFFFFFFFF00000000) == 0,
              "must be 32bit offset");
     }
 #endif // AMD64
     set_int_at(data_offset, (jint)val);
   }
   // Creation
   inline friend NativeJump* nativeJump_at(address address);
   void verify();
   // Unit testing stuff
   static void test() {}
   // Insertion of native jump instruction
   static void insert(address code_pos, address entry);
   // MT-safe insertion of native jump at verified method entry
   static void check_verified_entry_alignment(address entry, address verified_entry);
   static void patch_verified_entry(address entry, address verified_entry, address dest);
 };
 inline NativeJump* nativeJump_at(address address) {
   NativeJump* jump = (NativeJump*)(address - NativeJump::instruction_offset);
 #ifdef ASSERT
   jump->verify();
 #endif
   return jump;
 }
 // Handles all kinds of jump on Intel. Long/far, conditional/unconditional
 class NativeGeneralJump: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     // Constants does not apply, since the lengths and offsets depends on the actual jump
     // used
     // Instruction codes:
     //   Unconditional jumps: 0xE9    (rel32off), 0xEB (rel8off)
     //   Conditional jumps:   0x0F8x  (rel32off), 0x7x (rel8off)
     unconditional_long_jump  = 0xe9,
     unconditional_short_jump = 0xeb,
     instruction_size = 5
   };
   address instruction_address() const       { return addr_at(0); }
   address jump_destination()    const;
   // Creation
   inline friend NativeGeneralJump* nativeGeneralJump_at(address address);
   // Insertion of native general jump instruction
   static void insert_unconditional(address code_pos, address entry);
   static void replace_mt_safe(address instr_addr, address code_buffer);
   void verify();
 };
 inline NativeGeneralJump* nativeGeneralJump_at(address address) {
   NativeGeneralJump* jump = (NativeGeneralJump*)(address);
   debug_only(jump->verify();)
   return jump;
 }
 class NativePopReg : public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code            = 0x58,
     instruction_size            =    1,
     instruction_offset          =    0,
     data_offset                 =    1,
     next_instruction_offset     =    1
   };
   // Insert a pop instruction
   static void insert(address code_pos, Register reg);
 };
 class NativeIllegalInstruction: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code            = 0x0B0F,    // Real byte order is: 0x0F, 0x0B
     instruction_size            =    2,
     instruction_offset          =    0,
     next_instruction_offset     =    2
   };
   // Insert illegal opcode as specific address
   static void insert(address code_pos);
 };
 // return instruction that does not pop values of the stack
 class NativeReturn: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code            = 0xC3,
     instruction_size            =    1,
     instruction_offset          =    0,
     next_instruction_offset     =    1
   };
 };
 // return instruction that does pop values of the stack
 class NativeReturnX: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code            = 0xC2,
     instruction_size            =    2,
     instruction_offset          =    0,
     next_instruction_offset     =    2
   };
 };
 // Simple test vs memory
 class NativeTstRegMem: public NativeInstruction {
  public:
   enum Intel_specific_constants {
     instruction_code_memXregl   = 0x85
   };
 };
 inline bool NativeInstruction::is_illegal()      { return (short)int_at(0) == (short)NativeIllegalInstruction::instruction_code; }
 inline bool NativeInstruction::is_call()         { return ubyte_at(0) == NativeCall::instruction_code; }
 inline bool NativeInstruction::is_return()       { return ubyte_at(0) == NativeReturn::instruction_code ||
                                                           ubyte_at(0) == NativeReturnX::instruction_code; }
 inline bool NativeInstruction::is_jump()         { return ubyte_at(0) == NativeJump::instruction_code ||
                                                           ubyte_at(0) == 0xEB; /* short jump */ }
 inline bool NativeInstruction::is_cond_jump()    { return (int_at(0) & 0xF0FF) == 0x800F /* long jump */ ||
                                                           (ubyte_at(0) & 0xF0) == 0x70;  /* short jump */ }
 inline bool NativeInstruction::is_safepoint_poll() {
 #ifdef AMD64
   return ubyte_at(0) == NativeTstRegMem::instruction_code_memXregl &&
          ubyte_at(1) == 0x05 && // 00 rax 101
          ((intptr_t) addr_at(6)) + int_at(2) == (intptr_t) os::get_polling_page();
 #else
   return ( ubyte_at(0) == NativeMovRegMem::instruction_code_mem2regl ||
            ubyte_at(0) == NativeTstRegMem::instruction_code_memXregl ) &&
            (ubyte_at(1)&0xC7) == 0x05 && /* Mod R/M == disp32 */
            (os::is_poll_address((address)int_at(2)));
 #endif // AMD64
 }
 inline bool NativeInstruction::is_mov_literal64() {
 #ifdef AMD64
   return ((ubyte_at(0) == Assembler::REX_W || ubyte_at(0) == Assembler::REX_WB) &&
           (ubyte_at(1) & (0xff ^ NativeMovConstReg::register_mask)) == 0xB8);
 #else
   return false;
 #endif // AMD64
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/nativeInst_x86.hpp@437d03ea40b1 (annotated)

src/cpu/x86/vm/nativeInst_x86.hpp