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aarch64.c
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1/* Copyright (C) 2017-2023 Free Software Foundation, Inc.
2
3 This file is part of GDB.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17
18#include "gdbsupport/common-defs.h"
19#include "aarch64.h"
20#include <stdlib.h>
21
22#include "../features/aarch64-core.c"
23#include "../features/aarch64-fpu.c"
24#include "../features/aarch64-sve.c"
25#include "../features/aarch64-pauth.c"
26#include "../features/aarch64-mte.c"
27#include "../features/aarch64-tls.c"
28
29/* See arch/aarch64.h. */
30
33{
34 target_desc_up tdesc = allocate_target_description ();
35
36#ifndef IN_PROCESS_AGENT
37 set_tdesc_architecture (tdesc.get (), "aarch64");
38#endif
39
40 long regnum = 0;
41
43
44 if (features.vq == 0)
46 else
47 regnum = create_feature_aarch64_sve (tdesc.get (), regnum, features.vq);
48
49 if (features.pauth)
51
52 /* Memory tagging extension registers. */
53 if (features.mte)
55
56 /* TLS registers. */
57 if (features.tls > 0)
58 regnum = create_feature_aarch64_tls (tdesc.get (), regnum, features.tls);
59
60 return tdesc.release ();
61}
62
63/* See arch/aarch64.h. */
64
65CORE_ADDR
66aarch64_remove_top_bits (CORE_ADDR pointer, CORE_ADDR mask)
67{
68 /* The VA range select bit is 55. This bit tells us if we have a
69 kernel-space address or a user-space address. */
70 bool kernel_address = (pointer & VA_RANGE_SELECT_BIT_MASK) != 0;
71
72 /* Remove the top non-address bits. */
73 pointer &= ~mask;
74
75 /* Sign-extend if we have a kernel-space address. */
76 if (kernel_address)
77 pointer |= mask;
78
79 return pointer;
80}
81
82/* See arch/aarch64.h. */
83
84CORE_ADDR
85aarch64_mask_from_pac_registers (const CORE_ADDR cmask, const CORE_ADDR dmask)
86{
87 /* If the masks differ, default to using the one with the most coverage. */
88 if (dmask != cmask)
89 return dmask > cmask ? dmask : cmask;
90
91 return cmask;
92}
static int create_feature_aarch64_core(struct target_desc *result, long regnum)
Definition aarch64-core.c:7
static int create_feature_aarch64_fpu(struct target_desc *result, long regnum)
Definition aarch64-fpu.c:7
static int create_feature_aarch64_mte(struct target_desc *result, long regnum)
Definition aarch64-mte.c:7
static int create_feature_aarch64_pauth(struct target_desc *result, long regnum)
static int create_feature_aarch64_sve(struct target_desc *result, long regnum, uint64_t scale)
Definition aarch64-sve.c:25
int regnum
static int create_feature_aarch64_tls(struct target_desc *result, long regnum, int count)
Definition aarch64-tls.c:28
CORE_ADDR aarch64_remove_top_bits(CORE_ADDR pointer, CORE_ADDR mask)
Definition aarch64.c:66
target_desc * aarch64_create_target_description(const aarch64_features &features)
Definition aarch64.c:32
CORE_ADDR aarch64_mask_from_pac_registers(const CORE_ADDR cmask, const CORE_ADDR dmask)
Definition aarch64.c:85
#define VA_RANGE_SELECT_BIT_MASK
Definition aarch64.h:120
uint64_t vq
Definition aarch64.h:32
uint8_t tls
Definition aarch64.h:38
void set_tdesc_architecture(struct target_desc *target_desc, const char *name)
target_desc_up allocate_target_description(void)