1 /* Common target-dependent functionality for AArch64.
3 Copyright (C) 2017-2022 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #ifndef ARCH_AARCH64_H
21 #define ARCH_AARCH64_H
23 #include "gdbsupport/tdesc.h"
25 /* Holds information on what architectural features are available. This is
26 used to select register sets. */
27 struct aarch64_features
29 /* A non zero VQ value indicates both the presence of SVE and the
30 Vector Quotient - the number of 128bit chunks in an SVE Z
37 /* A positive TLS value indicates the number of TLS registers available. */
41 inline bool operator==(const aarch64_features &lhs, const aarch64_features &rhs)
43 return lhs.vq == rhs.vq
44 && lhs.pauth == rhs.pauth
46 && lhs.tls == rhs.tls;
52 struct hash<aarch64_features>
54 std::size_t operator()(const aarch64_features &features) const noexcept
59 h = h << 1 | features.pauth;
60 h = h << 1 | features.mte;
61 /* Shift by two bits for now. We may need to increase this in the future
62 if more TLS registers get added. */
63 h = h << 2 | features.tls;
69 /* Create the aarch64 target description. */
72 aarch64_create_target_description (const aarch64_features &features);
74 /* Register numbers of various important registers.
75 Note that on SVE, the Z registers reuse the V register numbers and the V
76 registers become pseudo registers. */
79 AARCH64_X0_REGNUM, /* First integer register. */
80 AARCH64_FP_REGNUM = AARCH64_X0_REGNUM + 29, /* Frame register, if used. */
81 AARCH64_LR_REGNUM = AARCH64_X0_REGNUM + 30, /* Return address. */
82 AARCH64_SP_REGNUM, /* Stack pointer. */
83 AARCH64_PC_REGNUM, /* Program counter. */
84 AARCH64_CPSR_REGNUM, /* Current Program Status Register. */
85 AARCH64_V0_REGNUM, /* First fp/vec register. */
86 AARCH64_V31_REGNUM = AARCH64_V0_REGNUM + 31, /* Last fp/vec register. */
87 AARCH64_SVE_Z0_REGNUM = AARCH64_V0_REGNUM, /* First SVE Z register. */
88 AARCH64_SVE_Z31_REGNUM = AARCH64_V31_REGNUM, /* Last SVE Z register. */
89 AARCH64_FPSR_REGNUM, /* Floating Point Status Register. */
90 AARCH64_FPCR_REGNUM, /* Floating Point Control Register. */
91 AARCH64_SVE_P0_REGNUM, /* First SVE predicate register. */
92 AARCH64_SVE_P15_REGNUM = AARCH64_SVE_P0_REGNUM + 15, /* Last SVE predicate
94 AARCH64_SVE_FFR_REGNUM, /* SVE First Fault Register. */
95 AARCH64_SVE_VG_REGNUM, /* SVE Vector Granule. */
97 /* Other useful registers. */
98 AARCH64_LAST_X_ARG_REGNUM = AARCH64_X0_REGNUM + 7,
99 AARCH64_STRUCT_RETURN_REGNUM = AARCH64_X0_REGNUM + 8,
100 AARCH64_LAST_V_ARG_REGNUM = AARCH64_V0_REGNUM + 7
103 /* Sizes of various AArch64 registers. */
104 #define AARCH64_TLS_REGISTER_SIZE 8
105 #define V_REGISTER_SIZE 16
107 /* Pseudo register base numbers. */
108 #define AARCH64_Q0_REGNUM 0
109 #define AARCH64_D0_REGNUM (AARCH64_Q0_REGNUM + AARCH64_D_REGISTER_COUNT)
110 #define AARCH64_S0_REGNUM (AARCH64_D0_REGNUM + 32)
111 #define AARCH64_H0_REGNUM (AARCH64_S0_REGNUM + 32)
112 #define AARCH64_B0_REGNUM (AARCH64_H0_REGNUM + 32)
113 #define AARCH64_SVE_V0_REGNUM (AARCH64_B0_REGNUM + 32)
115 #define AARCH64_PAUTH_DMASK_REGNUM(pauth_reg_base) (pauth_reg_base)
116 #define AARCH64_PAUTH_CMASK_REGNUM(pauth_reg_base) (pauth_reg_base + 1)
117 #define AARCH64_PAUTH_REGS_SIZE (16)
119 #define AARCH64_X_REGS_NUM 31
120 #define AARCH64_V_REGS_NUM 32
121 #define AARCH64_SVE_Z_REGS_NUM AARCH64_V_REGS_NUM
122 #define AARCH64_SVE_P_REGS_NUM 16
123 #define AARCH64_NUM_REGS AARCH64_FPCR_REGNUM + 1
124 #define AARCH64_SVE_NUM_REGS AARCH64_SVE_VG_REGNUM + 1
126 /* There are a number of ways of expressing the current SVE vector size:
129 The number of bytes in an SVE Z register.
130 VQ : Vector Quotient.
131 The number of 128bit chunks in an SVE Z register.
133 The number of 64bit chunks in an SVE Z register. */
135 #define sve_vg_from_vl(vl) ((vl) / 8)
136 #define sve_vl_from_vg(vg) ((vg) * 8)
137 #ifndef sve_vq_from_vl
138 #define sve_vq_from_vl(vl) ((vl) / 0x10)
140 #ifndef sve_vl_from_vq
141 #define sve_vl_from_vq(vq) ((vq) * 0x10)
143 #define sve_vq_from_vg(vg) (sve_vq_from_vl (sve_vl_from_vg (vg)))
144 #define sve_vg_from_vq(vq) (sve_vg_from_vl (sve_vl_from_vq (vq)))
147 /* Maximum supported VQ value. Increase if required. */
148 #define AARCH64_MAX_SVE_VQ 16
150 #endif /* ARCH_AARCH64_H */