1 #ifdef USE_PRAGMA_IDENT_SRC
2 #pragma ident "@(#)runtime_x86_32.cpp 1.113 07/09/17 09:26:02 JVM"
3 #endif
4 /*
5 * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
64 enum layout {
65 thread_off, // last_java_sp
66 // The frame sender code expects that rbp will be in the "natural" place and
67 // will override any oopMap setting for it. We must therefore force the layout
68 // so that it agrees with the frame sender code.
69 rbp_off,
70 return_off, // slot for return address
71 framesize
72 };
73
74 // allocate space for the code
75 ResourceMark rm;
76 // setup code generation tools
77 CodeBuffer buffer("exception_blob", 512, 512);
78 MacroAssembler* masm = new MacroAssembler(&buffer);
79
80 OopMapSet *oop_maps = new OopMapSet();
81
82 address start = __ pc();
83
84 __ pushl(rdx);
85 __ subl(rsp, return_off * wordSize); // Prolog!
86
87 // rbp, location is implicitly known
88 __ movl(Address(rsp,rbp_off *wordSize),rbp);
89
90 // Store exception in Thread object. We cannot pass any arguments to the
91 // handle_exception call, since we do not want to make any assumption
92 // about the size of the frame where the exception happened in.
93 __ get_thread(rcx);
94 __ movl(Address(rcx, JavaThread::exception_oop_offset()), rax);
95 __ movl(Address(rcx, JavaThread::exception_pc_offset()), rdx);
96
97 // This call does all the hard work. It checks if an exception handler
98 // exists in the method.
99 // If so, it returns the handler address.
100 // If not, it prepares for stack-unwinding, restoring the callee-save
101 // registers of the frame being removed.
102 //
103 __ movl(Address(rsp, thread_off * wordSize), rcx); // Thread is first argument
104 __ set_last_Java_frame(rcx, noreg, noreg, NULL);
105
106 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C)));
107
108 // No registers to map, rbp is known implicitly
109 oop_maps->add_gc_map( __ pc() - start, new OopMap( framesize, 0 ));
110 __ get_thread(rcx);
111 __ reset_last_Java_frame(rcx, false, false);
112
113 // Restore callee-saved registers
114 __ movl(rbp, Address(rsp, rbp_off * wordSize));
115
116 __ addl(rsp, return_off * wordSize); // Epilog!
117 __ popl(rdx); // Exception pc
118
119
120 // rax,: exception handler for given <exception oop/exception pc>
121
122 // We have a handler in rax, (could be deopt blob)
123 // rdx - throwing pc, deopt blob will need it.
124
125 __ pushl(rax);
126
127 // rcx contains handler address
128
129 __ get_thread(rcx); // TLS
130 // Get the exception
131 __ movl(rax, Address(rcx, JavaThread::exception_oop_offset()));
132 // Get the exception pc in case we are deoptimized
133 __ movl(rdx, Address(rcx, JavaThread::exception_pc_offset()));
134 #ifdef ASSERT
135 __ movl(Address(rcx, JavaThread::exception_handler_pc_offset()), 0);
136 __ movl(Address(rcx, JavaThread::exception_pc_offset()), 0);
137 #endif
138 // Clear the exception oop so GC no longer processes it as a root.
139 __ movl(Address(rcx, JavaThread::exception_oop_offset()), 0);
140
141 __ popl(rcx);
142
143 // rax,: exception oop
144 // rcx: exception handler
145 // rdx: exception pc
146 __ jmp (rcx);
147
148 // -------------
149 // make sure all code is generated
150 masm->flush();
151
152 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize);
153 }
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1 /*
2 * Copyright 1998-2008 Sun Microsystems, Inc. All Rights Reserved.
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 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
61 enum layout {
62 thread_off, // last_java_sp
63 // The frame sender code expects that rbp will be in the "natural" place and
64 // will override any oopMap setting for it. We must therefore force the layout
65 // so that it agrees with the frame sender code.
66 rbp_off,
67 return_off, // slot for return address
68 framesize
69 };
70
71 // allocate space for the code
72 ResourceMark rm;
73 // setup code generation tools
74 CodeBuffer buffer("exception_blob", 512, 512);
75 MacroAssembler* masm = new MacroAssembler(&buffer);
76
77 OopMapSet *oop_maps = new OopMapSet();
78
79 address start = __ pc();
80
81 __ push(rdx);
82 __ subptr(rsp, return_off * wordSize); // Prolog!
83
84 // rbp, location is implicitly known
85 __ movptr(Address(rsp,rbp_off *wordSize), rbp);
86
87 // Store exception in Thread object. We cannot pass any arguments to the
88 // handle_exception call, since we do not want to make any assumption
89 // about the size of the frame where the exception happened in.
90 __ get_thread(rcx);
91 __ movptr(Address(rcx, JavaThread::exception_oop_offset()), rax);
92 __ movptr(Address(rcx, JavaThread::exception_pc_offset()), rdx);
93
94 // This call does all the hard work. It checks if an exception handler
95 // exists in the method.
96 // If so, it returns the handler address.
97 // If not, it prepares for stack-unwinding, restoring the callee-save
98 // registers of the frame being removed.
99 //
100 __ movptr(Address(rsp, thread_off * wordSize), rcx); // Thread is first argument
101 __ set_last_Java_frame(rcx, noreg, noreg, NULL);
102
103 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C)));
104
105 // No registers to map, rbp is known implicitly
106 oop_maps->add_gc_map( __ pc() - start, new OopMap( framesize, 0 ));
107 __ get_thread(rcx);
108 __ reset_last_Java_frame(rcx, false, false);
109
110 // Restore callee-saved registers
111 __ movptr(rbp, Address(rsp, rbp_off * wordSize));
112
113 __ addptr(rsp, return_off * wordSize); // Epilog!
114 __ pop(rdx); // Exception pc
115
116
117 // rax,: exception handler for given <exception oop/exception pc>
118
119 // We have a handler in rax, (could be deopt blob)
120 // rdx - throwing pc, deopt blob will need it.
121
122 __ push(rax);
123
124 // rcx contains handler address
125
126 __ get_thread(rcx); // TLS
127 // Get the exception
128 __ movptr(rax, Address(rcx, JavaThread::exception_oop_offset()));
129 // Get the exception pc in case we are deoptimized
130 __ movptr(rdx, Address(rcx, JavaThread::exception_pc_offset()));
131 #ifdef ASSERT
132 __ movptr(Address(rcx, JavaThread::exception_handler_pc_offset()), (int32_t)NULL_WORD);
133 __ movptr(Address(rcx, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD);
134 #endif
135 // Clear the exception oop so GC no longer processes it as a root.
136 __ movptr(Address(rcx, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD);
137
138 __ pop(rcx);
139
140 // rax,: exception oop
141 // rcx: exception handler
142 // rdx: exception pc
143 __ jmp (rcx);
144
145 // -------------
146 // make sure all code is generated
147 masm->flush();
148
149 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize);
150 }
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