1 /* BFD support for AArch64.
2 Copyright (C) 2009-2024 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "libiberty.h"
25 #include "cpu-aarch64.h"
26
27 /* This routine is provided two arch_infos and works out which Aarch64
28 machine which would be compatible with both and returns a pointer
29 to its info structure. */
30
31 static const bfd_arch_info_type *
compatible(const bfd_arch_info_type * a,const bfd_arch_info_type * b)32 compatible (const bfd_arch_info_type * a, const bfd_arch_info_type * b)
33 {
34 /* If a & b are for different architecture we can do nothing. */
35 if (a->arch != b->arch)
36 return NULL;
37
38 /* If a & b are for the same machine then all is well. */
39 if (a->mach == b->mach)
40 return a;
41
42 /* Don't allow mixing data models. */
43 if ((a->mach ^ b->mach) & (bfd_mach_aarch64_ilp32 | bfd_mach_aarch64_llp64))
44 return NULL;
45
46 /* Otherwise if either a or b is the 'default' machine
47 then it can be polymorphed into the other. */
48 if (a->the_default)
49 return b;
50
51 if (b->the_default)
52 return a;
53
54 /* So far all newer cores are
55 supersets of previous cores. */
56 if (a->mach < b->mach)
57 return b;
58 else if (a->mach > b->mach)
59 return a;
60
61 /* Never reached! */
62 return NULL;
63 }
64
65 static struct
66 {
67 unsigned int mach;
68 char *name;
69 }
70 processors[] =
71 {
72 { bfd_mach_aarch64, "cortex-a34" },
73 { bfd_mach_aarch64, "cortex-a65" },
74 { bfd_mach_aarch64, "cortex-a65ae" },
75 { bfd_mach_aarch64, "cortex-a76ae" },
76 { bfd_mach_aarch64, "cortex-a77" },
77 { bfd_mach_aarch64, "cortex-a720" },
78 { bfd_mach_aarch64, "cortex-x3" },
79 { bfd_mach_aarch64, "cortex-x4" },
80 };
81
82 static bool
scan(const struct bfd_arch_info * info,const char * string)83 scan (const struct bfd_arch_info *info, const char *string)
84 {
85 int i;
86
87 /* First test for an exact match. */
88 if (strcasecmp (string, info->printable_name) == 0)
89 return true;
90
91 /* If there is a prefix of "aarch64:" then skip it. */
92 const char * colon;
93 if ((colon = strchr (string, ':')) != NULL)
94 {
95 if (strncasecmp (string, "aarch64", colon - string) != 0)
96 return false;
97 string = colon + 1;
98 }
99
100 /* Next check for a processor name instead of an Architecture name. */
101 for (i = sizeof (processors) / sizeof (processors[0]); i--;)
102 {
103 if (strcasecmp (string, processors[i].name) == 0)
104 break;
105 }
106
107 if (i != -1 && info->mach == processors[i].mach)
108 return true;
109
110 /* Finally check for the default architecture. */
111 if (strcasecmp (string, "aarch64") == 0)
112 return info->the_default;
113
114 return false;
115 }
116
117 /* Figure out if llp64 is default */
118 #if DEFAULT_VECTOR == aarch64_pe_le_vec
119 #define LLP64_DEFAULT true
120 #define AARCH64_DEFAULT false
121 #else
122 #define LLP64_DEFAULT false
123 #define AARCH64_DEFAULT true
124 #endif
125
126 #define N(NUMBER, PRINT, WORDSIZE, ADDRSIZE, DEFAULT, NEXT) \
127 { WORDSIZE, ADDRSIZE, 8, bfd_arch_aarch64, NUMBER, \
128 "aarch64", PRINT, 4, DEFAULT, compatible, scan, \
129 bfd_arch_default_fill, NEXT, 0 }
130
131 static const bfd_arch_info_type bfd_aarch64_arch_v8_r =
132 N (bfd_mach_aarch64_8R, "aarch64:armv8-r", 64, 64, false, NULL);
133
134 static const bfd_arch_info_type bfd_aarch64_arch_ilp32 =
135 N (bfd_mach_aarch64_ilp32, "aarch64:ilp32", 32, 32, false,
136 &bfd_aarch64_arch_v8_r);
137
138 static const bfd_arch_info_type bfd_aarch64_arch_llp64 =
139 N (bfd_mach_aarch64_llp64, "aarch64:llp64", 32, 64, LLP64_DEFAULT,
140 &bfd_aarch64_arch_ilp32);
141
142 const bfd_arch_info_type bfd_aarch64_arch =
143 N (0, "aarch64", 64, 64, AARCH64_DEFAULT, &bfd_aarch64_arch_llp64);
144
145 bool
bfd_is_aarch64_special_symbol_name(const char * name,int type)146 bfd_is_aarch64_special_symbol_name (const char *name, int type)
147 {
148 if (!name || name[0] != '$')
149 return false;
150 if (name[1] == 'x' || name[1] == 'd')
151 type &= BFD_AARCH64_SPECIAL_SYM_TYPE_MAP;
152 else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p')
153 type &= BFD_AARCH64_SPECIAL_SYM_TYPE_TAG;
154 else
155 return false;
156
157 return (type != 0 && (name[2] == 0 || name[2] == '.'));
158 }
159