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
|
/* Copyright (C) 2014-2022 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU Transactional Memory Library (libitm).
Libitm is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libitm 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 General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "asmcfi.h"
#define BTI_C hint 34
#define PACIASP hint 25
#define AUTIASP hint 29
#define PACIBSP hint 27
#define AUTIBSP hint 31
#if defined(HAVE_AS_CFI_PSEUDO_OP) && defined(__GCC_HAVE_DWARF2_CFI_ASM)
# define cfi_window_save .cfi_window_save
# define cfi_b_key_frame .cfi_b_key_frame
#else
# define cfi_window_save
# define cfi_b_key_frame
#endif
#if __ARM_FEATURE_PAC_DEFAULT & 1
# define CFI_PAC_TOGGLE cfi_window_save
# define CFI_PAC_KEY
# define PAC_AND_BTI PACIASP
# define AUT AUTIASP
#elif __ARM_FEATURE_PAC_DEFAULT & 2
# define CFI_PAC_TOGGLE cfi_window_save
# define CFI_PAC_KEY cfi_b_key_frame
# define PAC_AND_BTI PACIBSP
# define AUT AUTIBSP
#else
# define CFI_PAC_TOGGLE
# define CFI_PAC_KEY
# define PAC_AND_BTI BTI_C
# define AUT
#endif
.text
.align 2
.global _ITM_beginTransaction
.type _ITM_beginTransaction, %function
_ITM_beginTransaction:
cfi_startproc
CFI_PAC_KEY
PAC_AND_BTI
CFI_PAC_TOGGLE
mov x1, sp
stp x29, x30, [sp, -11*16]!
cfi_adjust_cfa_offset(11*16)
cfi_rel_offset(x29, 0)
cfi_rel_offset(x30, 8)
mov x29, sp
stp x19, x20, [sp, 1*16]
stp x21, x22, [sp, 2*16]
stp x23, x24, [sp, 3*16]
stp x25, x26, [sp, 4*16]
stp x27, x28, [sp, 5*16]
stp d8, d9, [sp, 6*16]
stp d10, d11, [sp, 7*16]
stp d12, d13, [sp, 8*16]
stp d14, d15, [sp, 9*16]
str x1, [sp, 10*16]
/* Invoke GTM_begin_transaction with the struct we just built. */
mov x1, sp
bl GTM_begin_transaction
/* Return; we don't need to restore any of the call-saved regs. */
ldp x29, x30, [sp], 11*16
cfi_adjust_cfa_offset(-11*16)
cfi_restore(x29)
cfi_restore(x30)
AUT
CFI_PAC_TOGGLE
ret
cfi_endproc
.size _ITM_beginTransaction, . - _ITM_beginTransaction
.align 2
.global GTM_longjmp
.hidden GTM_longjmp
.type GTM_longjmp, %function
GTM_longjmp:
/* The first parameter becomes the return value (x0).
The third parameter is ignored for now. */
cfi_startproc
CFI_PAC_KEY
BTI_C
ldp x19, x20, [x1, 1*16]
ldp x21, x22, [x1, 2*16]
ldp x23, x24, [x1, 3*16]
ldp x25, x26, [x1, 4*16]
ldp x27, x28, [x1, 5*16]
ldp d8, d9, [x1, 6*16]
ldp d10, d11, [x1, 7*16]
ldp d12, d13, [x1, 8*16]
ldp d14, d15, [x1, 9*16]
ldr x3, [x1, 10*16]
ldp x29, x30, [x1]
cfi_def_cfa(x1, 0)
CFI_PAC_TOGGLE
mov sp, x3
AUT
CFI_PAC_TOGGLE
br x30
cfi_endproc
.size GTM_longjmp, . - GTM_longjmp
/* GNU_PROPERTY_AARCH64_* macros from elf.h for use in asm code. */
#define FEATURE_1_AND 0xc0000000
#define FEATURE_1_BTI 1
#define FEATURE_1_PAC 2
/* Supported features based on the code generation options. */
#if defined(__ARM_FEATURE_BTI_DEFAULT)
# define BTI_FLAG FEATURE_1_BTI
#else
# define BTI_FLAG 0
#endif
#if __ARM_FEATURE_PAC_DEFAULT & 3
# define PAC_FLAG FEATURE_1_PAC
#else
# define PAC_FLAG 0
#endif
/* Add a NT_GNU_PROPERTY_TYPE_0 note. */
#define GNU_PROPERTY(type, value) \
.section .note.gnu.property, "a"; \
.p2align 3; \
.word 4; \
.word 16; \
.word 5; \
.asciz "GNU"; \
.word type; \
.word 4; \
.word value; \
.word 0;
#if defined(__linux__) || defined(__FreeBSD__)
.section .note.GNU-stack, "", %progbits
/* Add GNU property note if built with branch protection. */
# if (BTI_FLAG|PAC_FLAG) != 0
GNU_PROPERTY (FEATURE_1_AND, BTI_FLAG|PAC_FLAG)
# endif
#endif
|