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
|
/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
Based on work contributed by David Mosberger (davidm@cs.arizona.edu).
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
<http://www.gnu.org/licenses/>. */
/* Assembly stub to invoke __mcount_internal(). Compiler-generated
code calls mcount after executing a function's prologue, placing
the "lr" register in "r10" for the call. As a result "lr" is the
function that invoked mcount, and "r10" is mcount's caller's
caller. However, we have to save all the parameter registers here
before invoking _mcount_internal. Callee-save and temporary
registers need no special attention. We save r10 and restore it to
lr on the way out, to properly handle the case of ENTRY() in
assembly code, before lr is saved. We use the name __mcount since
the gcc community prefers using the reserved namespace. */
#include <sysdep.h>
.text
ENTRY(__mcount)
{
st sp, lr
ADDI_PTR r29, sp, - (12 * REGSIZE)
}
cfi_offset (lr, 0)
{
ADDI_PTR sp, sp, - (13 * REGSIZE)
st r29, sp
ADDI_PTR r29, r29, REGSIZE
}
cfi_def_cfa_offset (13 * REGSIZE)
{ st r29, r0; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r1; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r2; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r3; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r4; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r5; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r6; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r7; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r8; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r9; ADDI_PTR r29, r29, REGSIZE }
{ st r29, r10; ADDI_PTR r29, r29, REGSIZE; move r0, r10 }
{
move r1, lr
jal __mcount_internal
}
{
ADDI_PTR r29, sp, (2 * REGSIZE)
}
{ ld r0, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r1, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r2, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r3, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r4, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r5, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r6, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r7, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r8, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r9, r29; ADDI_PTR r29, r29, REGSIZE }
{ ld r10, r29; ADDI_PTR sp, sp, (13 * REGSIZE) }
cfi_def_cfa_offset (0)
{
ld lr, sp
}
{
move lr, r10
jrp lr
}
END(__mcount)
#undef mcount
weak_alias (__mcount, _mcount) /* exported in gmon/Versions */
weak_alias (__mcount, mcount) /* exported in stdlib/Versions */
|
