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7145346: VerifyStackAtCalls is broken Summary: Replace call_epilog() encoding with macroassembler use. Moved duplicated code to x86.ad. Fixed return_addr() definition. Reviewed-by: never
author kvn
date Thu, 16 Feb 2012 17:12:49 -0800
parents 95134e034042
children
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4949:ad3b47344802 4950:9b8ce46870df
1 // 1 //
2 // Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. 2 // Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
3 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 // 4 //
5 // This code is free software; you can redistribute it and/or modify it 5 // This code is free software; you can redistribute it and/or modify it
6 // under the terms of the GNU General Public License version 2 only, as 6 // under the terms of the GNU General Public License version 2 only, as
7 // published by the Free Software Foundation. 7 // published by the Free Software Foundation.
22 // 22 //
23 // 23 //
24 24
25 // X86 Solaris Architecture Description File 25 // X86 Solaris Architecture Description File
26 26
27 //----------OS-DEPENDENT ENCODING BLOCK-----------------------------------------------------
28 // This block specifies the encoding classes used by the compiler to output
29 // byte streams. Encoding classes generate functions which are called by
30 // Machine Instruction Nodes in order to generate the bit encoding of the
31 // instruction. Operands specify their base encoding interface with the
32 // interface keyword. There are currently supported four interfaces,
33 // REG_INTER, CONST_INTER, MEMORY_INTER, & COND_INTER. REG_INTER causes an
34 // operand to generate a function which returns its register number when
35 // queried. CONST_INTER causes an operand to generate a function which
36 // returns the value of the constant when queried. MEMORY_INTER causes an
37 // operand to generate four functions which return the Base Register, the
38 // Index Register, the Scale Value, and the Offset Value of the operand when
39 // queried. COND_INTER causes an operand to generate six functions which
40 // return the encoding code (ie - encoding bits for the instruction)
41 // associated with each basic boolean condition for a conditional instruction.
42 // Instructions specify two basic values for encoding. They use the
43 // ins_encode keyword to specify their encoding class (which must be one of
44 // the class names specified in the encoding block), and they use the
45 // opcode keyword to specify, in order, their primary, secondary, and
46 // tertiary opcode. Only the opcode sections which a particular instruction
47 // needs for encoding need to be specified.
48 encode %{
49 // Build emit functions for each basic byte or larger field in the intel
50 // encoding scheme (opcode, rm, sib, immediate), and call them from C++
51 // code in the enc_class source block. Emit functions will live in the
52 // main source block for now. In future, we can generalize this by
53 // adding a syntax that specifies the sizes of fields in an order,
54 // so that the adlc can build the emit functions automagically
55
56 enc_class solaris_tlsencode (eRegP dst) %{
57 Register dstReg = as_Register($dst$$reg);
58 MacroAssembler* masm = new MacroAssembler(&cbuf);
59 masm->get_thread(dstReg);
60 %}
61
62 enc_class solaris_breakpoint %{
63 MacroAssembler* masm = new MacroAssembler(&cbuf);
64 // Really need to fix this
65 masm->push(rax);
66 masm->push(rcx);
67 masm->push(rdx);
68 masm->call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
69 masm->pop(rdx);
70 masm->pop(rcx);
71 masm->pop(rax);
72 %}
73
74 enc_class call_epilog %{
75 if( VerifyStackAtCalls ) {
76 // Check that stack depth is unchanged: find majik cookie on stack
77 int framesize = ra_->reg2offset_unchecked(OptoReg::add(ra_->_matcher._old_SP,-3*VMRegImpl::slots_per_word));
78 if(framesize >= 128) {
79 emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood
80 emit_d8(cbuf,0xBC);
81 emit_d8(cbuf,0x24);
82 emit_d32(cbuf,framesize); // Find majik cookie from ESP
83 emit_d32(cbuf, 0xbadb100d);
84 }
85 else {
86 emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood
87 emit_d8(cbuf,0x7C);
88 emit_d8(cbuf,0x24);
89 emit_d8(cbuf,framesize); // Find majik cookie from ESP
90 emit_d32(cbuf, 0xbadb100d);
91 }
92 // jmp EQ around INT3
93 // QQQ TODO
94 const int jump_around = 11; // size of call to breakpoint (and register preserve), 1 for CC
95 emit_opcode(cbuf,0x74);
96 emit_d8(cbuf, jump_around);
97 // QQQ temporary
98 emit_break(cbuf);
99 // Die if stack mismatch
100 // emit_opcode(cbuf,0xCC);
101 }
102 %}
103
104 %}
105
106 // INSTRUCTIONS -- Platform dependent
107
108 //----------OS and Locking Instructions----------------------------------------
109
110 // This name is KNOWN by the ADLC and cannot be changed.
111 // The ADLC forces a 'TypeRawPtr::BOTTOM' output type
112 // for this guy.
113 instruct tlsLoadP(eRegP dst, eFlagsReg cr) %{
114 match(Set dst (ThreadLocal));
115 effect(DEF dst, KILL cr);
116
117 format %{ "MOV $dst, Thread::current()" %}
118 ins_encode( solaris_tlsencode(dst) );
119 ins_pipe( ialu_reg_fat );
120 %}
121
122 instruct TLS(eRegP dst) %{
123 match(Set dst (ThreadLocal));
124
125 expand %{
126 tlsLoadP(dst);
127 %}
128 %}
129
130 // Die now
131 instruct ShouldNotReachHere( )
132 %{
133 match(Halt);
134
135 // Use the following format syntax
136 format %{ "INT3 ; ShouldNotReachHere" %}
137 // QQQ TODO for now call breakpoint
138 // opcode(0xCC);
139 // ins_encode(Opc);
140 ins_encode(solaris_breakpoint);
141 ins_pipe( pipe_slow );
142 %}
143
144
145
146 // Platform dependent source
147
148 source %{
149
150 // emit an interrupt that is caught by the debugger
151 void emit_break(CodeBuffer &cbuf) {
152
153 // Debugger doesn't really catch this but best we can do so far QQQ
154 MacroAssembler* masm = new MacroAssembler(&cbuf);
155 masm->call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
156 }
157
158 void MachBreakpointNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const {
159 emit_break(cbuf);
160 }
161
162
163 uint MachBreakpointNode::size(PhaseRegAlloc *ra_) const {
164 return MachNode::size(ra_);
165 }
166
167 %}