Mercurial > hg > truffle
annotate src/cpu/x86/vm/relocInfo_x86.cpp @ 1627:c5f1ea9e15e8
Merge
author | coleenp |
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date | Mon, 28 Jun 2010 12:03:05 -0400 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 1998, 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 # include "incls/_precompiled.incl" | |
26 # include "incls/_relocInfo_x86.cpp.incl" | |
27 | |
28 | |
29 void Relocation::pd_set_data_value(address x, intptr_t o) { | |
30 #ifdef AMD64 | |
31 x += o; | |
32 typedef Assembler::WhichOperand WhichOperand; | |
304 | 33 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm, call32, narrow oop |
0 | 34 assert(which == Assembler::disp32_operand || |
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35 which == Assembler::narrow_oop_operand || |
304 | 36 which == Assembler::imm_operand, "format unpacks ok"); |
37 if (which == Assembler::imm_operand) { | |
0 | 38 *pd_address_in_code() = x; |
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39 } else if (which == Assembler::narrow_oop_operand) { |
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40 address disp = Assembler::locate_operand(addr(), which); |
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41 *(int32_t*) disp = oopDesc::encode_heap_oop((oop)x); |
0 | 42 } else { |
43 // Note: Use runtime_call_type relocations for call32_operand. | |
44 address ip = addr(); | |
45 address disp = Assembler::locate_operand(ip, which); | |
46 address next_ip = Assembler::locate_next_instruction(ip); | |
47 *(int32_t*) disp = x - next_ip; | |
48 } | |
49 #else | |
50 *pd_address_in_code() = x + o; | |
51 #endif // AMD64 | |
52 } | |
53 | |
54 | |
55 address Relocation::pd_call_destination(address orig_addr) { | |
56 intptr_t adj = 0; | |
57 if (orig_addr != NULL) { | |
58 // We just moved this call instruction from orig_addr to addr(). | |
59 // This means its target will appear to have grown by addr() - orig_addr. | |
60 adj = -( addr() - orig_addr ); | |
61 } | |
62 NativeInstruction* ni = nativeInstruction_at(addr()); | |
63 if (ni->is_call()) { | |
64 return nativeCall_at(addr())->destination() + adj; | |
65 } else if (ni->is_jump()) { | |
66 return nativeJump_at(addr())->jump_destination() + adj; | |
67 } else if (ni->is_cond_jump()) { | |
68 return nativeGeneralJump_at(addr())->jump_destination() + adj; | |
69 } else if (ni->is_mov_literal64()) { | |
70 return (address) ((NativeMovConstReg*)ni)->data(); | |
71 } else { | |
72 ShouldNotReachHere(); | |
73 return NULL; | |
74 } | |
75 } | |
76 | |
77 | |
78 void Relocation::pd_set_call_destination(address x) { | |
79 NativeInstruction* ni = nativeInstruction_at(addr()); | |
80 if (ni->is_call()) { | |
81 nativeCall_at(addr())->set_destination(x); | |
82 } else if (ni->is_jump()) { | |
83 NativeJump* nj = nativeJump_at(addr()); | |
304 | 84 |
85 // Unresolved jumps are recognized by a destination of -1 | |
86 // However 64bit can't actually produce such an address | |
87 // and encodes a jump to self but jump_destination will | |
88 // return a -1 as the signal. We must not relocate this | |
89 // jmp or the ic code will not see it as unresolved. | |
90 | |
0 | 91 if (nj->jump_destination() == (address) -1) { |
304 | 92 x = addr(); // jump to self |
0 | 93 } |
94 nj->set_jump_destination(x); | |
95 } else if (ni->is_cond_jump()) { | |
96 // %%%% kludge this, for now, until we get a jump_destination method | |
97 address old_dest = nativeGeneralJump_at(addr())->jump_destination(); | |
98 address disp = Assembler::locate_operand(addr(), Assembler::call32_operand); | |
99 *(jint*)disp += (x - old_dest); | |
100 } else if (ni->is_mov_literal64()) { | |
101 ((NativeMovConstReg*)ni)->set_data((intptr_t)x); | |
102 } else { | |
103 ShouldNotReachHere(); | |
104 } | |
105 } | |
106 | |
107 | |
108 address* Relocation::pd_address_in_code() { | |
109 // All embedded Intel addresses are stored in 32-bit words. | |
110 // Since the addr points at the start of the instruction, | |
111 // we must parse the instruction a bit to find the embedded word. | |
112 assert(is_data(), "must be a DataRelocation"); | |
113 typedef Assembler::WhichOperand WhichOperand; | |
304 | 114 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32 |
0 | 115 #ifdef AMD64 |
116 assert(which == Assembler::disp32_operand || | |
117 which == Assembler::call32_operand || | |
304 | 118 which == Assembler::imm_operand, "format unpacks ok"); |
119 if (which != Assembler::imm_operand) { | |
0 | 120 // The "address" in the code is a displacement can't return it as |
121 // and address* since it is really a jint* | |
122 ShouldNotReachHere(); | |
123 return NULL; | |
124 } | |
125 #else | |
304 | 126 assert(which == Assembler::disp32_operand || which == Assembler::imm_operand, "format unpacks ok"); |
0 | 127 #endif // AMD64 |
128 return (address*) Assembler::locate_operand(addr(), which); | |
129 } | |
130 | |
131 | |
132 address Relocation::pd_get_address_from_code() { | |
133 #ifdef AMD64 | |
134 // All embedded Intel addresses are stored in 32-bit words. | |
135 // Since the addr points at the start of the instruction, | |
136 // we must parse the instruction a bit to find the embedded word. | |
137 assert(is_data(), "must be a DataRelocation"); | |
138 typedef Assembler::WhichOperand WhichOperand; | |
304 | 139 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32 |
0 | 140 assert(which == Assembler::disp32_operand || |
141 which == Assembler::call32_operand || | |
304 | 142 which == Assembler::imm_operand, "format unpacks ok"); |
143 if (which != Assembler::imm_operand) { | |
0 | 144 address ip = addr(); |
145 address disp = Assembler::locate_operand(ip, which); | |
146 address next_ip = Assembler::locate_next_instruction(ip); | |
147 address a = next_ip + *(int32_t*) disp; | |
148 return a; | |
149 } | |
150 #endif // AMD64 | |
151 return *pd_address_in_code(); | |
152 } | |
153 | |
154 int Relocation::pd_breakpoint_size() { | |
155 // minimum breakpoint size, in short words | |
156 return NativeIllegalInstruction::instruction_size / sizeof(short); | |
157 } | |
158 | |
159 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) { | |
160 Untested("pd_swap_in_breakpoint"); | |
161 if (instrs != NULL) { | |
162 assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data"); | |
163 for (int i = 0; i < instrlen; i++) { | |
164 instrs[i] = ((short*)x)[i]; | |
165 } | |
166 } | |
167 NativeIllegalInstruction::insert(x); | |
168 } | |
169 | |
170 | |
171 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) { | |
172 Untested("pd_swap_out_breakpoint"); | |
173 assert(NativeIllegalInstruction::instruction_size == sizeof(short), "right address unit for update"); | |
174 NativeInstruction* ni = nativeInstruction_at(x); | |
175 *(short*)ni->addr_at(0) = instrs[0]; | |
176 } | |
304 | 177 |
178 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
179 #ifdef _LP64 | |
180 typedef Assembler::WhichOperand WhichOperand; | |
181 WhichOperand which = (WhichOperand) format(); | |
182 // This format is imm but it is really disp32 | |
183 which = Assembler::disp32_operand; | |
184 address orig_addr = old_addr_for(addr(), src, dest); | |
185 NativeInstruction* oni = nativeInstruction_at(orig_addr); | |
186 int32_t* orig_disp = (int32_t*) Assembler::locate_operand(orig_addr, which); | |
187 // This poll_addr is incorrect by the size of the instruction it is irrelevant | |
188 intptr_t poll_addr = (intptr_t)oni + *orig_disp; | |
189 | |
190 NativeInstruction* ni = nativeInstruction_at(addr()); | |
191 intptr_t new_disp = poll_addr - (intptr_t) ni; | |
192 | |
193 int32_t* disp = (int32_t*) Assembler::locate_operand(addr(), which); | |
194 * disp = (int32_t)new_disp; | |
195 | |
196 #endif // _LP64 | |
197 } | |
198 | |
199 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
200 #ifdef _LP64 | |
201 typedef Assembler::WhichOperand WhichOperand; | |
202 WhichOperand which = (WhichOperand) format(); | |
203 // This format is imm but it is really disp32 | |
204 which = Assembler::disp32_operand; | |
205 address orig_addr = old_addr_for(addr(), src, dest); | |
206 NativeInstruction* oni = nativeInstruction_at(orig_addr); | |
207 int32_t* orig_disp = (int32_t*) Assembler::locate_operand(orig_addr, which); | |
208 // This poll_addr is incorrect by the size of the instruction it is irrelevant | |
209 intptr_t poll_addr = (intptr_t)oni + *orig_disp; | |
210 | |
211 NativeInstruction* ni = nativeInstruction_at(addr()); | |
212 intptr_t new_disp = poll_addr - (intptr_t) ni; | |
213 | |
214 int32_t* disp = (int32_t*) Assembler::locate_operand(addr(), which); | |
215 * disp = (int32_t)new_disp; | |
216 #endif // _LP64 | |
217 } |