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
|
/* Copyright (C) 1997-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef _AARCH64_SYSDEP_H
#define _AARCH64_SYSDEP_H
#include <sysdeps/generic/sysdep.h>
#ifdef __LP64__
# define AARCH64_R(NAME) R_AARCH64_ ## NAME
# define PTR_REG(n) x##n
# define PTR_LOG_SIZE 3
# define DELOUSE(n)
#else
# define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
# define PTR_REG(n) w##n
# define PTR_LOG_SIZE 2
# define DELOUSE(n) mov w##n, w##n
#endif
#define PTR_SIZE (1<<PTR_LOG_SIZE)
#ifdef __ASSEMBLER__
/* Syntactic details of assembler. */
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
/* Define an entry point visible from C. */
#define ENTRY(name) \
.globl C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name),%function; \
.align 4; \
C_LABEL(name) \
cfi_startproc; \
CALL_MCOUNT
/* Define an entry point visible from C. */
#define ENTRY_ALIGN(name, align) \
.globl C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name),%function; \
.p2align align; \
C_LABEL(name) \
cfi_startproc; \
CALL_MCOUNT
/* Define an entry point visible from C with a specified alignment and
pre-padding with NOPs. This can be used to ensure that a critical
loop within a function is cache line aligned. Note this version
does not adjust the padding if CALL_MCOUNT is defined. */
#define ENTRY_ALIGN_AND_PAD(name, align, padding) \
.globl C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name),%function; \
.p2align align; \
.rep padding; \
nop; \
.endr; \
C_LABEL(name) \
cfi_startproc; \
CALL_MCOUNT
#undef END
#define END(name) \
cfi_endproc; \
ASM_SIZE_DIRECTIVE(name)
/* If compiled for profiling, call `mcount' at the start of each function. */
#ifdef PROF
# define CALL_MCOUNT \
str x30, [sp, #-80]!; \
cfi_adjust_cfa_offset (80); \
cfi_rel_offset (x30, 0); \
stp x0, x1, [sp, #16]; \
cfi_rel_offset (x0, 16); \
cfi_rel_offset (x1, 24); \
stp x2, x3, [sp, #32]; \
cfi_rel_offset (x2, 32); \
cfi_rel_offset (x3, 40); \
stp x4, x5, [sp, #48]; \
cfi_rel_offset (x4, 48); \
cfi_rel_offset (x5, 56); \
stp x6, x7, [sp, #64]; \
cfi_rel_offset (x6, 64); \
cfi_rel_offset (x7, 72); \
mov x0, x30; \
bl mcount; \
ldp x0, x1, [sp, #16]; \
cfi_restore (x0); \
cfi_restore (x1); \
ldp x2, x3, [sp, #32]; \
cfi_restore (x2); \
cfi_restore (x3); \
ldp x4, x5, [sp, #48]; \
cfi_restore (x4); \
cfi_restore (x5); \
ldp x6, x7, [sp, #64]; \
cfi_restore (x6); \
cfi_restore (x7); \
ldr x30, [sp], #80; \
cfi_adjust_cfa_offset (-80); \
cfi_restore (x30);
#else
# define CALL_MCOUNT /* Do nothing. */
#endif
/* Local label name for asm code. */
#ifndef L
# define L(name) .L##name
#endif
/* Load or store to/from a pc-relative EXPR into/from R, using T.
Note R and T are register numbers and not register names. */
#define LDST_PCREL(OP, R, T, EXPR) \
adrp x##T, EXPR; \
OP PTR_REG (R), [x##T, #:lo12:EXPR]; \
/* Load or store to/from a got-relative EXPR into/from R, using T.
Note R and T are register numbers and not register names. */
#define LDST_GLOBAL(OP, R, T, EXPR) \
adrp x##T, :got:EXPR; \
ldr PTR_REG (T), [x##T, #:got_lo12:EXPR]; \
OP PTR_REG (R), [x##T];
/* Load an immediate into R.
Note R is a register number and not a register name. */
#ifdef __LP64__
# define MOVL(R, NAME) \
movz PTR_REG (R), #:abs_g3:NAME; \
movk PTR_REG (R), #:abs_g2_nc:NAME; \
movk PTR_REG (R), #:abs_g1_nc:NAME; \
movk PTR_REG (R), #:abs_g0_nc:NAME;
#else
# define MOVL(R, NAME) \
movz PTR_REG (R), #:abs_g1:NAME; \
movk PTR_REG (R), #:abs_g0_nc:NAME;
#endif
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
C name space. Make sure we use an innocuous name. */
#define syscall_error __syscall_error
#define mcount _mcount
#endif /* __ASSEMBLER__ */
#endif /* _AARCH64_SYSDEP_H */
|
