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src/os_cpu/linux_x86/vm/linux_x86_64.ad@a61af66fc99e (annotated)

src/os_cpu/linux_x86/vm/linux_x86_64.ad

Sat, 01 Dec 2007 00:00:00 +0000

author

duke

date

Sat, 01 Dec 2007 00:00:00 +0000

changeset 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

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duke@435	1	//
duke@435	2	// Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	//
duke@435	5	// This code is free software; you can redistribute it and/or modify it
duke@435	6	// under the terms of the GNU General Public License version 2 only, as
duke@435	7	// published by the Free Software Foundation.
duke@435	8	//
duke@435	9	// This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	// version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	// accompanied this code).
duke@435	14	//
duke@435	15	// You should have received a copy of the GNU General Public License version
duke@435	16	// 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	// Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	//
duke@435	19	// Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	// CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	// have any questions.
duke@435	22	//
duke@435	23	//
duke@435	24
duke@435	25	// AMD64 Linux Architecture Description File
duke@435	26
duke@435	27	//----------OS-DEPENDENT ENCODING BLOCK----------------------------------------
duke@435	28	// This block specifies the encoding classes used by the compiler to
duke@435	29	// output byte streams. Encoding classes generate functions which are
duke@435	30	// called by Machine Instruction Nodes in order to generate the bit
duke@435	31	// encoding of the instruction. Operands specify their base encoding
duke@435	32	// interface with the interface keyword. There are currently
duke@435	33	// supported four interfaces, REG_INTER, CONST_INTER, MEMORY_INTER, &
duke@435	34	// COND_INTER. REG_INTER causes an operand to generate a function
duke@435	35	// which returns its register number when queried. CONST_INTER causes
duke@435	36	// an operand to generate a function which returns the value of the
duke@435	37	// constant when queried. MEMORY_INTER causes an operand to generate
duke@435	38	// four functions which return the Base Register, the Index Register,
duke@435	39	// the Scale Value, and the Offset Value of the operand when queried.
duke@435	40	// COND_INTER causes an operand to generate six functions which return
duke@435	41	// the encoding code (ie - encoding bits for the instruction)
duke@435	42	// associated with each basic boolean condition for a conditional
duke@435	43	// instruction. Instructions specify two basic values for encoding.
duke@435	44	// They use the ins_encode keyword to specify their encoding class
duke@435	45	// (which must be one of the class names specified in the encoding
duke@435	46	// block), and they use the opcode keyword to specify, in order, their
duke@435	47	// primary, secondary, and tertiary opcode. Only the opcode sections
duke@435	48	// which a particular instruction needs for encoding need to be
duke@435	49	// specified.
duke@435	50	encode %{
duke@435	51	// Build emit functions for each basic byte or larger field in the intel
duke@435	52	// encoding scheme (opcode, rm, sib, immediate), and call them from C++
duke@435	53	// code in the enc_class source block. Emit functions will live in the
duke@435	54	// main source block for now. In future, we can generalize this by
duke@435	55	// adding a syntax that specifies the sizes of fields in an order,
duke@435	56	// so that the adlc can build the emit functions automagically
duke@435	57
duke@435	58	enc_class Java_To_Runtime(method meth)
duke@435	59	%{
duke@435	60	// No relocation needed
duke@435	61
duke@435	62	// movq r10, <meth>
duke@435	63	emit_opcode(cbuf, Assembler::REX_WB);
duke@435	64	emit_opcode(cbuf, 0xB8 | (R10_enc - 8));
duke@435	65	emit_d64(cbuf, (int64_t) $meth$$method);
duke@435	66
duke@435	67	// call (r10)
duke@435	68	emit_opcode(cbuf, Assembler::REX_B);
duke@435	69	emit_opcode(cbuf, 0xFF);
duke@435	70	emit_opcode(cbuf, 0xD0 | (R10_enc - 8));
duke@435	71	%}
duke@435	72
duke@435	73	enc_class linux_breakpoint
duke@435	74	%{
duke@435	75	MacroAssembler* masm = new MacroAssembler(&cbuf);
duke@435	76	masm->call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
duke@435	77	%}
duke@435	78
duke@435	79	enc_class call_epilog
duke@435	80	%{
duke@435	81	if (VerifyStackAtCalls) {
duke@435	82	// Check that stack depth is unchanged: find majik cookie on stack
duke@435	83	int framesize =
duke@435	84	ra_->reg2offset_unchecked(OptoReg::add(ra_->_matcher._old_SP, -3*VMRegImpl::slots_per_word));
duke@435	85	if (framesize) {
duke@435	86	if (framesize < 0x80) {
duke@435	87	emit_opcode(cbuf, Assembler::REX_W);
duke@435	88	emit_opcode(cbuf, 0x81); // cmpq [rsp+0],0xbadb1ood
duke@435	89	emit_d8(cbuf, 0x7C);
duke@435	90	emit_d8(cbuf, 0x24);
duke@435	91	emit_d8(cbuf, framesize); // Find majik cookie from ESP
duke@435	92	emit_d32(cbuf, 0xbadb100d);
duke@435	93	} else {
duke@435	94	emit_opcode(cbuf, Assembler::REX_W);
duke@435	95	emit_opcode(cbuf, 0x81); // cmpq [rsp+0],0xbadb1ood
duke@435	96	emit_d8(cbuf, 0xBC);
duke@435	97	emit_d8(cbuf, 0x24);
duke@435	98	emit_d32(cbuf, framesize); // Find majik cookie from ESP
duke@435	99	emit_d32(cbuf, 0xbadb100d);
duke@435	100	}
duke@435	101	}
duke@435	102	// jmp EQ around INT3
duke@435	103	// QQQ TODO
duke@435	104	const int jump_around = 5; // size of call to breakpoint, 1 for CC
duke@435	105	emit_opcode(cbuf, 0x74);
duke@435	106	emit_d8(cbuf, jump_around);
duke@435	107	// QQQ temporary
duke@435	108	emit_break(cbuf);
duke@435	109	// Die if stack mismatch
duke@435	110	// emit_opcode(cbuf,0xCC);
duke@435	111	}
duke@435	112	%}
duke@435	113
duke@435	114	%}
duke@435	115
duke@435	116	// INSTRUCTIONS -- Platform dependent
duke@435	117
duke@435	118	//----------OS and Locking Instructions----------------------------------------
duke@435	119
duke@435	120	// This name is KNOWN by the ADLC and cannot be changed.
duke@435	121	// The ADLC forces a 'TypeRawPtr::BOTTOM' output type
duke@435	122	// for this guy.
duke@435	123	instruct tlsLoadP(r15_RegP dst)
duke@435	124	%{
duke@435	125	match(Set dst (ThreadLocal));
duke@435	126	effect(DEF dst);
duke@435	127
duke@435	128	size(0);
duke@435	129	format %{ "# TLS is in R15" %}
duke@435	130	ins_encode( /*empty encoding*/ );
duke@435	131	ins_pipe(ialu_reg_reg);
duke@435	132	%}
duke@435	133
duke@435	134	// Die now
duke@435	135	instruct ShouldNotReachHere()
duke@435	136	%{
duke@435	137	match(Halt);
duke@435	138
duke@435	139	// Use the following format syntax
duke@435	140	format %{ "int3\t# ShouldNotReachHere" %}
duke@435	141	// QQQ TODO for now call breakpoint
duke@435	142	// opcode(0xCC);
duke@435	143	// ins_encode(Opc);
duke@435	144	ins_encode(linux_breakpoint);
duke@435	145	ins_pipe(pipe_slow);
duke@435	146	%}
duke@435	147
duke@435	148
duke@435	149	// Platform dependent source
duke@435	150
duke@435	151	source
duke@435	152	%{
duke@435	153
duke@435	154	int MachCallRuntimeNode::ret_addr_offset() {
duke@435	155	return 13; // movq r10,#addr; callq (r10)
duke@435	156	}
duke@435	157
duke@435	158	// emit an interrupt that is caught by the debugger
duke@435	159	void emit_break(CodeBuffer& cbuf) {
duke@435	160	// Debugger doesn't really catch this but best we can do so far QQQ
duke@435	161	MacroAssembler* masm = new MacroAssembler(&cbuf);
duke@435	162	masm->call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
duke@435	163	}
duke@435	164
duke@435	165	void MachBreakpointNode::emit(CodeBuffer& cbuf, PhaseRegAlloc* ra_) const {
duke@435	166	emit_break(cbuf);
duke@435	167	}
duke@435	168
duke@435	169	uint MachBreakpointNode::size(PhaseRegAlloc* ra_) const {
duke@435	170	return 5;
duke@435	171	}
duke@435	172
duke@435	173	%}