Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/linux_x86_32.ad @ 2396:b868d9928221
Merge
author | twisti |
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date | Thu, 24 Mar 2011 23:04:40 -0700 |
parents | c18cbe5936b8 |
children | 95134e034042 |
rev | line source |
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0 | 1 // |
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2 // Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. |
0 | 3 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 // | |
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 | |
7 // published by the Free Software Foundation. | |
8 // | |
9 // This code is distributed in the hope that it will be useful, but WITHOUT | |
10 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 // version 2 for more details (a copy is included in the LICENSE file that | |
13 // accompanied this code). | |
14 // | |
15 // You should have received a copy of the GNU General Public License version | |
16 // 2 along with this work; if not, write to the Free Software Foundation, | |
17 // Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 // | |
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19 // Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 // or visit www.oracle.com if you need additional information or have any |
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21 // questions. |
0 | 22 // |
23 // | |
24 | |
25 // X86 Linux Architecture Description File | |
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 linux_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 linux_breakpoint %{ | |
63 MacroAssembler* masm = new MacroAssembler(&cbuf); | |
64 masm->call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); | |
65 %} | |
66 | |
67 enc_class call_epilog %{ | |
68 if( VerifyStackAtCalls ) { | |
69 // Check that stack depth is unchanged: find majik cookie on stack | |
70 int framesize = ra_->reg2offset_unchecked(OptoReg::add(ra_->_matcher._old_SP,-3*VMRegImpl::slots_per_word)); | |
71 if(framesize >= 128) { | |
72 emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood | |
73 emit_d8(cbuf,0xBC); | |
74 emit_d8(cbuf,0x24); | |
75 emit_d32(cbuf,framesize); // Find majik cookie from ESP | |
76 emit_d32(cbuf, 0xbadb100d); | |
77 } | |
78 else { | |
79 emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood | |
80 emit_d8(cbuf,0x7C); | |
81 emit_d8(cbuf,0x24); | |
82 emit_d8(cbuf,framesize); // Find majik cookie from ESP | |
83 emit_d32(cbuf, 0xbadb100d); | |
84 } | |
85 // jmp EQ around INT3 | |
86 // QQQ TODO | |
87 const int jump_around = 5; // size of call to breakpoint, 1 for CC | |
88 emit_opcode(cbuf,0x74); | |
89 emit_d8(cbuf, jump_around); | |
90 // QQQ temporary | |
91 emit_break(cbuf); | |
92 // Die if stack mismatch | |
93 // emit_opcode(cbuf,0xCC); | |
94 } | |
95 %} | |
96 | |
97 %} | |
98 | |
99 // INSTRUCTIONS -- Platform dependent | |
100 | |
101 //----------OS and Locking Instructions---------------------------------------- | |
102 | |
103 // This name is KNOWN by the ADLC and cannot be changed. | |
104 // The ADLC forces a 'TypeRawPtr::BOTTOM' output type | |
105 // for this guy. | |
420 | 106 instruct tlsLoadP(eRegP dst, eFlagsReg cr) %{ |
0 | 107 match(Set dst (ThreadLocal)); |
108 effect(DEF dst, KILL cr); | |
109 | |
420 | 110 format %{ "MOV $dst, Thread::current()" %} |
0 | 111 ins_encode( linux_tlsencode(dst) ); |
112 ins_pipe( ialu_reg_fat ); | |
113 %} | |
114 | |
420 | 115 instruct TLS(eRegP dst) %{ |
0 | 116 match(Set dst (ThreadLocal)); |
117 | |
118 expand %{ | |
119 tlsLoadP(dst); | |
120 %} | |
121 %} | |
122 | |
123 // Die now | |
124 instruct ShouldNotReachHere( ) | |
125 %{ | |
126 match(Halt); | |
127 | |
128 // Use the following format syntax | |
129 format %{ "INT3 ; ShouldNotReachHere" %} | |
130 // QQQ TODO for now call breakpoint | |
131 // opcode(0xCC); | |
132 // ins_encode(Opc); | |
133 ins_encode(linux_breakpoint); | |
134 ins_pipe( pipe_slow ); | |
135 %} | |
136 | |
137 | |
138 | |
139 // Platform dependent source | |
140 | |
141 source %{ | |
142 | |
143 // emit an interrupt that is caught by the debugger | |
144 void emit_break(CodeBuffer &cbuf) { | |
145 | |
146 // Debugger doesn't really catch this but best we can do so far QQQ | |
147 MacroAssembler* masm = new MacroAssembler(&cbuf); | |
148 masm->call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); | |
149 } | |
150 | |
151 void MachBreakpointNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const { | |
152 emit_break(cbuf); | |
153 } | |
154 | |
155 | |
156 uint MachBreakpointNode::size(PhaseRegAlloc *ra_) const { | |
157 return 5; | |
158 } | |
159 | |
160 %} |