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
|
/* PLT trampolines. ARC version.
Copyright (C) 2020-2021 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, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <libc-symbols.h>
#include <sysdep.h>
#include <sys/syscall.h>
/* resolver has atypical calling ABI (r11 and r12)
PLTn which lands us here, sets up
r11 = Module info (tpnt pointer as expected by resolver)
r12 = PC of the PLTn itself - needed by resolver to find
corresponding .rela.plt entry. */
ENTRY (_dl_runtime_resolve)
/* save args to func being resolved before entering resolver. */
push_s r0
push_s r1
push_s r2
push_s r3
st.a r4, [sp, -4]
st.a r5, [sp, -4]
st.a r6, [sp, -4]
st.a r7, [sp, -4]
st.a r8, [sp, -4]
st.a r9, [sp, -4]
cfi_adjust_cfa_offset (40)
push_s blink
cfi_adjust_cfa_offset (4)
cfi_rel_offset (blink, 0)
mov_s r1, r12
bl.d _dl_fixup
mov r0, r11
/* restore regs back. */
ld.ab blink,[sp, 4]
cfi_adjust_cfa_offset (-4)
cfi_restore (blink)
ld.ab r9, [sp, 4]
ld.ab r8, [sp, 4]
ld.ab r7, [sp, 4]
ld.ab r6, [sp, 4]
ld.ab r5, [sp, 4]
ld.ab r4, [sp, 4]
pop_s r3
pop_s r2
pop_s r1
cfi_adjust_cfa_offset (-36)
j_s.d [r0] /* r0 has resolved function addr. */
pop_s r0 /* restore first arg to resolved call. */
cfi_adjust_cfa_offset (-4)
cfi_restore (r0)
END (_dl_runtime_resolve)
|
