Mercurial > hg > graal-jvmci-8
comparison src/cpu/x86/vm/relocInfo_x86.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c436414a719e |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 1998-2005 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 * | |
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; | |
33 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64, call32 | |
34 assert(which == Assembler::disp32_operand || | |
35 which == Assembler::imm64_operand, "format unpacks ok"); | |
36 if (which == Assembler::imm64_operand) { | |
37 *pd_address_in_code() = x; | |
38 } else { | |
39 // Note: Use runtime_call_type relocations for call32_operand. | |
40 address ip = addr(); | |
41 address disp = Assembler::locate_operand(ip, which); | |
42 address next_ip = Assembler::locate_next_instruction(ip); | |
43 *(int32_t*) disp = x - next_ip; | |
44 } | |
45 #else | |
46 *pd_address_in_code() = x + o; | |
47 #endif // AMD64 | |
48 } | |
49 | |
50 | |
51 address Relocation::pd_call_destination(address orig_addr) { | |
52 intptr_t adj = 0; | |
53 if (orig_addr != NULL) { | |
54 // We just moved this call instruction from orig_addr to addr(). | |
55 // This means its target will appear to have grown by addr() - orig_addr. | |
56 adj = -( addr() - orig_addr ); | |
57 } | |
58 NativeInstruction* ni = nativeInstruction_at(addr()); | |
59 if (ni->is_call()) { | |
60 return nativeCall_at(addr())->destination() + adj; | |
61 } else if (ni->is_jump()) { | |
62 return nativeJump_at(addr())->jump_destination() + adj; | |
63 } else if (ni->is_cond_jump()) { | |
64 return nativeGeneralJump_at(addr())->jump_destination() + adj; | |
65 } else if (ni->is_mov_literal64()) { | |
66 return (address) ((NativeMovConstReg*)ni)->data(); | |
67 } else { | |
68 ShouldNotReachHere(); | |
69 return NULL; | |
70 } | |
71 } | |
72 | |
73 | |
74 void Relocation::pd_set_call_destination(address x) { | |
75 NativeInstruction* ni = nativeInstruction_at(addr()); | |
76 if (ni->is_call()) { | |
77 nativeCall_at(addr())->set_destination(x); | |
78 } else if (ni->is_jump()) { | |
79 NativeJump* nj = nativeJump_at(addr()); | |
80 #ifdef AMD64 | |
81 if (nj->jump_destination() == (address) -1) { | |
82 x = (address) -1; // retain jump to self | |
83 } | |
84 #endif // AMD64 | |
85 nj->set_jump_destination(x); | |
86 } else if (ni->is_cond_jump()) { | |
87 // %%%% kludge this, for now, until we get a jump_destination method | |
88 address old_dest = nativeGeneralJump_at(addr())->jump_destination(); | |
89 address disp = Assembler::locate_operand(addr(), Assembler::call32_operand); | |
90 *(jint*)disp += (x - old_dest); | |
91 } else if (ni->is_mov_literal64()) { | |
92 ((NativeMovConstReg*)ni)->set_data((intptr_t)x); | |
93 } else { | |
94 ShouldNotReachHere(); | |
95 } | |
96 } | |
97 | |
98 | |
99 address* Relocation::pd_address_in_code() { | |
100 // All embedded Intel addresses are stored in 32-bit words. | |
101 // Since the addr points at the start of the instruction, | |
102 // we must parse the instruction a bit to find the embedded word. | |
103 assert(is_data(), "must be a DataRelocation"); | |
104 typedef Assembler::WhichOperand WhichOperand; | |
105 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64/imm32 | |
106 #ifdef AMD64 | |
107 assert(which == Assembler::disp32_operand || | |
108 which == Assembler::call32_operand || | |
109 which == Assembler::imm64_operand, "format unpacks ok"); | |
110 if (which != Assembler::imm64_operand) { | |
111 // The "address" in the code is a displacement can't return it as | |
112 // and address* since it is really a jint* | |
113 ShouldNotReachHere(); | |
114 return NULL; | |
115 } | |
116 #else | |
117 assert(which == Assembler::disp32_operand || which == Assembler::imm32_operand, "format unpacks ok"); | |
118 #endif // AMD64 | |
119 return (address*) Assembler::locate_operand(addr(), which); | |
120 } | |
121 | |
122 | |
123 address Relocation::pd_get_address_from_code() { | |
124 #ifdef AMD64 | |
125 // All embedded Intel addresses are stored in 32-bit words. | |
126 // Since the addr points at the start of the instruction, | |
127 // we must parse the instruction a bit to find the embedded word. | |
128 assert(is_data(), "must be a DataRelocation"); | |
129 typedef Assembler::WhichOperand WhichOperand; | |
130 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm64/imm32 | |
131 assert(which == Assembler::disp32_operand || | |
132 which == Assembler::call32_operand || | |
133 which == Assembler::imm64_operand, "format unpacks ok"); | |
134 if (which != Assembler::imm64_operand) { | |
135 address ip = addr(); | |
136 address disp = Assembler::locate_operand(ip, which); | |
137 address next_ip = Assembler::locate_next_instruction(ip); | |
138 address a = next_ip + *(int32_t*) disp; | |
139 return a; | |
140 } | |
141 #endif // AMD64 | |
142 return *pd_address_in_code(); | |
143 } | |
144 | |
145 int Relocation::pd_breakpoint_size() { | |
146 // minimum breakpoint size, in short words | |
147 return NativeIllegalInstruction::instruction_size / sizeof(short); | |
148 } | |
149 | |
150 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) { | |
151 Untested("pd_swap_in_breakpoint"); | |
152 if (instrs != NULL) { | |
153 assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data"); | |
154 for (int i = 0; i < instrlen; i++) { | |
155 instrs[i] = ((short*)x)[i]; | |
156 } | |
157 } | |
158 NativeIllegalInstruction::insert(x); | |
159 } | |
160 | |
161 | |
162 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) { | |
163 Untested("pd_swap_out_breakpoint"); | |
164 assert(NativeIllegalInstruction::instruction_size == sizeof(short), "right address unit for update"); | |
165 NativeInstruction* ni = nativeInstruction_at(x); | |
166 *(short*)ni->addr_at(0) = instrs[0]; | |
167 } |