1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/* PLT trampolines. x86-64 version.
Copyright (C) 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
.text
.globl _dl_runtime_resolve
.type _dl_runtime_resolve, @function
.align 16
cfi_startproc
_dl_runtime_resolve:
subq $56,%rsp
cfi_adjust_cfa_offset(72) # Incorporate PLT
movq %rax,(%rsp) # Preserve registers otherwise clobbered.
movq %rcx, 8(%rsp)
movq %rdx, 16(%rsp)
movq %rsi, 24(%rsp)
movq %rdi, 32(%rsp)
movq %r8, 40(%rsp)
movq %r9, 48(%rsp)
movq 64(%rsp), %rsi # Copy args pushed by PLT in register.
movq %rsi, %r11 # Multiply by 24
addq %r11, %rsi
addq %r11, %rsi
shlq $3, %rsi
movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
call _dl_fixup # Call resolver.
movq %rax, %r11 # Save return value
movq 48(%rsp), %r9 # Get register content back.
movq 40(%rsp), %r8
movq 32(%rsp), %rdi
movq 24(%rsp), %rsi
movq 16(%rsp), %rdx
movq 8(%rsp), %rcx
movq (%rsp), %rax
addq $72, %rsp # Adjust stack(PLT did 2 pushes)
cfi_adjust_cfa_offset(-72)
jmp *%r11 # Jump to function address.
cfi_endproc
.size _dl_runtime_resolve, .-_dl_runtime_resolve
#ifndef PROF
.globl _dl_runtime_profile
.type _dl_runtime_profile, @function
.align 16
cfi_startproc
_dl_runtime_profile:
subq $80, %rsp
cfi_adjust_cfa_offset(96) # Incorporate PLT
movq %rax, (%rsp) # Preserve registers otherwise clobbered.
movq %rdx, 8(%rsp)
movq %r8, 16(%rsp)
movq %r9, 24(%rsp)
movq %rcx, 32(%rsp)
movq %rsi, 40(%rsp)
movq %rdi, 48(%rsp)
movq %rbp, 56(%rsp) # Information for auditors.
leaq 96(%rsp), %rax
movq %rax, 64(%rsp)
leaq 8(%rsp), %rcx
movq 96(%rsp), %rdx # Load return address if needed
movq 88(%rsp), %rsi # Copy args pushed by PLT in register.
movq %rsi,%r11 # Multiply by 24
addq %r11,%rsi
addq %r11,%rsi
shlq $3, %rsi
movq 80(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
leaq 72(%rsp), %r8
call _dl_profile_fixup # Call resolver.
movq %rax, %r11 # Save return value
movq 8(%rsp), %rdx # Get back register content.
movq 16(%rsp), %r8
movq 24(%rsp), %r9
movq (%rsp),%rax
movq 72(%rsp), %r10
testq %r10, %r10
jns 1f
movq 32(%rsp), %rcx
movq 40(%rsp), %rsi
movq 48(%rsp), %rdi
addq $96,%rsp # Adjust stack
cfi_adjust_cfa_offset (-96)
jmp *%r11 # Jump to function address.
/*
+96 return address
+88 PLT2
+80 PLT1
+72 free
+64 %rsp
+56 %rbp
+48 %rdi
+40 %rsi
+32 %rcx
+24 %r9
+16 %r8
+8 %rdx
%esp %rax
*/
cfi_adjust_cfa_offset (96)
1: movq %rbx, 72(%rsp)
cfi_rel_offset (1, 72)
leaq 104(%rsp), %rsi
movq %rsp, %rbx
cfi_def_cfa_register (1)
subq %r10, %rsp
movq %rsp, %rdi
movq %r10, %rcx
shrq $3, %rcx
rep
movsq
andq $0xfffffffffffffff0, %rsp
movq 32(%rbx), %rcx
movq 40(%rbx), %rsi
movq 48(%rbx), %rdi
call *%r11
movq %rbx, %rsp
cfi_def_cfa_register (7)
subq $72, %rsp
cfi_adjust_cfa_offset (72)
movq %rsp, %rcx
movq %rax, (%rcx)
movq %rdx, 8(%rcx)
/* Even though the stack is correctly aligned to allow using movaps
we use movups. Some callers might provide an incorrectly aligned
stack and we do not want to have it blow up here. */
movups %xmm0, 16(%rcx)
movups %xmm1, 32(%rcx)
fstpt 48(%rcx)
fstpt 64(%rcx)
/*
+168 return address
+160 PLT2
+152 PLT1
+144 free
+136 %rsp
+128 %rbp
+120 %rdi
+112 %rsi
+104 %rcx
+96 %r9
+88 %r8
+80 %rdx
+64 %st1 result
+48 %st result
+32 %xmm1 result
+16 %xmm0 result
+8 %rdx result
%esp %rax result
*/
leaq 80(%rsp), %rdx
movq 144(%rsp), %rbx
cfi_restore (1)
movq 160(%rsp), %rsi # Copy args pushed by PLT in register.
movq %rsi,%r11 # Multiply by 24
addq %r11,%rsi
addq %r11,%rsi
shlq $3, %rsi
movq 152(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
call _dl_call_pltexit
movq (%rsp), %rax
movq 8(%rsp), %rdx
movups 16(%rsp), %xmm0
movups 32(%rsp), %xmm1
fldt 64(%rsp)
fldt 48(%rsp)
addq $168, %rsp
cfi_adjust_cfa_offset (-168)
retq
cfi_endproc
.size _dl_runtime_profile, .-_dl_runtime_profile
#endif
|
