| // |
| // Copyright 1999-2006 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. |
| // |
| // |
| |
| // X86 Win32 Architecture Description File |
| |
| //----------OS-DEPENDENT ENCODING BLOCK----------------------------------------------------- |
| // This block specifies the encoding classes used by the compiler to output |
| // byte streams. Encoding classes generate functions which are called by |
| // Machine Instruction Nodes in order to generate the bit encoding of the |
| // instruction. Operands specify their base encoding interface with the |
| // interface keyword. There are currently supported four interfaces, |
| // REG_INTER, CONST_INTER, MEMORY_INTER, & COND_INTER. REG_INTER causes an |
| // operand to generate a function which returns its register number when |
| // queried. CONST_INTER causes an operand to generate a function which |
| // returns the value of the constant when queried. MEMORY_INTER causes an |
| // operand to generate four functions which return the Base Register, the |
| // Index Register, the Scale Value, and the Offset Value of the operand when |
| // queried. COND_INTER causes an operand to generate six functions which |
| // return the encoding code (ie - encoding bits for the instruction) |
| // associated with each basic boolean condition for a conditional instruction. |
| // Instructions specify two basic values for encoding. They use the |
| // ins_encode keyword to specify their encoding class (which must be one of |
| // the class names specified in the encoding block), and they use the |
| // opcode keyword to specify, in order, their primary, secondary, and |
| // tertiary opcode. Only the opcode sections which a particular instruction |
| // needs for encoding need to be specified. |
| encode %{ |
| // Build emit functions for each basic byte or larger field in the intel |
| // encoding scheme (opcode, rm, sib, immediate), and call them from C++ |
| // code in the enc_class source block. Emit functions will live in the |
| // main source block for now. In future, we can generalize this by |
| // adding a syntax that specifies the sizes of fields in an order, |
| // so that the adlc can build the emit functions automagically |
| |
| enc_class tlsencode (eRegP dst, eRegP src) %{ |
| emit_rm(cbuf, 0x2, $dst$$reg, $src$$reg); |
| emit_d32(cbuf, ThreadLocalStorage::get_thread_ptr_offset() ); |
| %} |
| |
| enc_class call_epilog %{ |
| if( VerifyStackAtCalls ) { |
| // Check that stack depth is unchanged: find majik cookie on stack |
| int framesize = ra_->reg2offset_unchecked(OptoReg::add(ra_->_matcher._old_SP,-3*VMRegImpl::slots_per_word)); |
| if(framesize >= 128) { |
| emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood |
| emit_d8(cbuf,0xBC); |
| emit_d8(cbuf,0x24); |
| emit_d32(cbuf,framesize); // Find majik cookie from ESP |
| emit_d32(cbuf, 0xbadb100d); |
| } |
| else { |
| emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood |
| emit_d8(cbuf,0x7C); |
| emit_d8(cbuf,0x24); |
| emit_d8(cbuf,framesize); // Find majik cookie from ESP |
| emit_d32(cbuf, 0xbadb100d); |
| } |
| // jmp EQ around INT3 |
| emit_opcode(cbuf,0x74); |
| emit_d8(cbuf,1); |
| // Die if stack mismatch |
| emit_opcode(cbuf,0xCC); |
| } |
| %} |
| |
| %} |
| |
| // INSTRUCTIONS -- Platform dependent |
| |
| |
| //----------OS and Locking Instructions---------------------------------------- |
| |
| // The prefix of this name is KNOWN by the ADLC and cannot be changed. |
| instruct tlsLoadP_prefixLoadP(eRegP t1) %{ |
| effect(DEF t1); |
| |
| format %{ "MOV $t1,FS:[0x00] "%} |
| opcode(0x8B, 0x64); |
| ins_encode(OpcS, OpcP, conmemref(t1)); |
| ins_pipe( ialu_reg_fat ); |
| %} |
| |
| // This name is KNOWN by the ADLC and cannot be changed. |
| // The ADLC forces a 'TypeRawPtr::BOTTOM' output type |
| // for this guy. |
| // %%% Should do this with a clause like: bottom_type(TypeRawPtr::BOTTOM); |
| instruct tlsLoadP(eRegP dst, eRegP t1) %{ |
| effect(DEF dst, USE t1); |
| |
| format %{ "MOV $dst,[$t1 + TLS::thread_ptr_offset()]" %} |
| opcode(0x8B); |
| ins_encode(OpcP, tlsencode(dst, t1)); |
| ins_pipe( ialu_reg_reg_fat ); |
| %} |
| |
| instruct TLS(eRegP dst) %{ |
| match(Set dst (ThreadLocal)); |
| expand %{ |
| eRegP t1; |
| tlsLoadP_prefixLoadP(t1); |
| tlsLoadP(dst, t1); |
| %} |
| %} |
| |
| // Die now |
| instruct ShouldNotReachHere( ) |
| %{ |
| match(Halt); |
| // Use the following format syntax |
| format %{ "INT3 ; ShouldNotReachHere" %} |
| opcode(0xCC); |
| ins_encode(OpcP); |
| ins_pipe( pipe_slow ); |
| %} |
| |
| // |
| // Platform dependent source |
| // |
| source %{ |
| |
| // emit an interrupt that is caught by the debugger |
| void emit_break(CodeBuffer &cbuf) { |
| *(cbuf.code_end()) = (unsigned char)(0xcc); |
| cbuf.set_code_end(cbuf.code_end() + 1); |
| } |
| |
| void MachBreakpointNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const { |
| emit_break(cbuf); |
| } |
| |
| |
| uint MachBreakpointNode::size(PhaseRegAlloc *ra_) const { |
| return 1; |
| } |
| |
| |
| %} |