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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
30
31/* See arch/aarch64.h. */
32
35{
36 target_desc_up tdesc = allocate_target_description ();
37
38#ifndef IN_PROCESS_AGENT
39 set_tdesc_architecture (tdesc.get (), "aarch64");
40#endif
41
42 long regnum = 0;
43
45
46 if (features.vq == 0)
48 else
49 regnum = create_feature_aarch64_sve (tdesc.get (), regnum, features.vq);
50
51 if (features.pauth)
53
54 /* Memory tagging extension registers. */
55 if (features.mte)
57
58 /* TLS registers. */
59 if (features.tls > 0)
60 regnum = create_feature_aarch64_tls (tdesc.get (), regnum, features.tls);
61
62 if (features.svq)
64 sve_vl_from_vq (features.svq));
65
66 if (features.sme2)
68
69 return tdesc.release ();
70}
71
72/* See arch/aarch64.h. */
73
74CORE_ADDR
75aarch64_remove_top_bits (CORE_ADDR pointer, CORE_ADDR mask)
76{
77 /* The VA range select bit is 55. This bit tells us if we have a
78 kernel-space address or a user-space address. */
79 bool kernel_address = (pointer & VA_RANGE_SELECT_BIT_MASK) != 0;
80
81 /* Remove the top non-address bits. */
82 pointer &= ~mask;
83
84 /* Sign-extend if we have a kernel-space address. */
85 if (kernel_address)
86 pointer |= mask;
87
88 return pointer;
89}
90
91/* See arch/aarch64.h. */
92
93CORE_ADDR
94aarch64_mask_from_pac_registers (const CORE_ADDR cmask, const CORE_ADDR dmask)
95{
96 /* If the masks differ, default to using the one with the most coverage. */
97 if (dmask != cmask)
98 return dmask > cmask ? dmask : cmask;
99
100 return cmask;
101}
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_sme2(struct target_desc *result, long regnum)
static int create_feature_aarch64_sme(struct target_desc *result, long regnum, size_t svl)
Definition aarch64-sme.c:30
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:75
target_desc * aarch64_create_target_description(const aarch64_features &features)
Definition aarch64.c:34
CORE_ADDR aarch64_mask_from_pac_registers(const CORE_ADDR cmask, const CORE_ADDR dmask)
Definition aarch64.c:94
#define sve_vl_from_vq(vq)
Definition aarch64.h:190
#define VA_RANGE_SELECT_BIT_MASK
Definition aarch64.h:145
uint64_t vq
Definition aarch64.h:34
uint8_t svq
Definition aarch64.h:50
uint8_t tls
Definition aarch64.h:39
void set_tdesc_architecture(struct target_desc *target_desc, const char *name)
target_desc_up allocate_target_description(void)