Mercurial > hg > truffle
annotate src/cpu/x86/vm/relocInfo_x86.cpp @ 255:ef72a36b968e
Merge
author | kvn |
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date | Wed, 30 Jul 2008 09:54:21 -0700 |
parents | d1605aabd0a1 |
children | dc7f315e41f7 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1998-2008 Sun Microsystems, Inc. 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 * | |
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 * | |
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; | |
164
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33 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64, call32, narrow oop |
0 | 34 assert(which == Assembler::disp32_operand || |
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35 which == Assembler::narrow_oop_operand || |
0 | 36 which == Assembler::imm64_operand, "format unpacks ok"); |
37 if (which == Assembler::imm64_operand) { | |
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()); | |
84 #ifdef AMD64 | |
85 if (nj->jump_destination() == (address) -1) { | |
86 x = (address) -1; // retain jump to self | |
87 } | |
88 #endif // AMD64 | |
89 nj->set_jump_destination(x); | |
90 } else if (ni->is_cond_jump()) { | |
91 // %%%% kludge this, for now, until we get a jump_destination method | |
92 address old_dest = nativeGeneralJump_at(addr())->jump_destination(); | |
93 address disp = Assembler::locate_operand(addr(), Assembler::call32_operand); | |
94 *(jint*)disp += (x - old_dest); | |
95 } else if (ni->is_mov_literal64()) { | |
96 ((NativeMovConstReg*)ni)->set_data((intptr_t)x); | |
97 } else { | |
98 ShouldNotReachHere(); | |
99 } | |
100 } | |
101 | |
102 | |
103 address* Relocation::pd_address_in_code() { | |
104 // All embedded Intel addresses are stored in 32-bit words. | |
105 // Since the addr points at the start of the instruction, | |
106 // we must parse the instruction a bit to find the embedded word. | |
107 assert(is_data(), "must be a DataRelocation"); | |
108 typedef Assembler::WhichOperand WhichOperand; | |
109 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64/imm32 | |
110 #ifdef AMD64 | |
111 assert(which == Assembler::disp32_operand || | |
112 which == Assembler::call32_operand || | |
113 which == Assembler::imm64_operand, "format unpacks ok"); | |
114 if (which != Assembler::imm64_operand) { | |
115 // The "address" in the code is a displacement can't return it as | |
116 // and address* since it is really a jint* | |
117 ShouldNotReachHere(); | |
118 return NULL; | |
119 } | |
120 #else | |
121 assert(which == Assembler::disp32_operand || which == Assembler::imm32_operand, "format unpacks ok"); | |
122 #endif // AMD64 | |
123 return (address*) Assembler::locate_operand(addr(), which); | |
124 } | |
125 | |
126 | |
127 address Relocation::pd_get_address_from_code() { | |
128 #ifdef AMD64 | |
129 // All embedded Intel addresses are stored in 32-bit words. | |
130 // Since the addr points at the start of the instruction, | |
131 // we must parse the instruction a bit to find the embedded word. | |
132 assert(is_data(), "must be a DataRelocation"); | |
133 typedef Assembler::WhichOperand WhichOperand; | |
134 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64/imm32 | |
135 assert(which == Assembler::disp32_operand || | |
136 which == Assembler::call32_operand || | |
137 which == Assembler::imm64_operand, "format unpacks ok"); | |
138 if (which != Assembler::imm64_operand) { | |
139 address ip = addr(); | |
140 address disp = Assembler::locate_operand(ip, which); | |
141 address next_ip = Assembler::locate_next_instruction(ip); | |
142 address a = next_ip + *(int32_t*) disp; | |
143 return a; | |
144 } | |
145 #endif // AMD64 | |
146 return *pd_address_in_code(); | |
147 } | |
148 | |
149 int Relocation::pd_breakpoint_size() { | |
150 // minimum breakpoint size, in short words | |
151 return NativeIllegalInstruction::instruction_size / sizeof(short); | |
152 } | |
153 | |
154 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) { | |
155 Untested("pd_swap_in_breakpoint"); | |
156 if (instrs != NULL) { | |
157 assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data"); | |
158 for (int i = 0; i < instrlen; i++) { | |
159 instrs[i] = ((short*)x)[i]; | |
160 } | |
161 } | |
162 NativeIllegalInstruction::insert(x); | |
163 } | |
164 | |
165 | |
166 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) { | |
167 Untested("pd_swap_out_breakpoint"); | |
168 assert(NativeIllegalInstruction::instruction_size == sizeof(short), "right address unit for update"); | |
169 NativeInstruction* ni = nativeInstruction_at(x); | |
170 *(short*)ni->addr_at(0) = instrs[0]; | |
171 } |