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/* Common target dependent code for GDB on AArch64 systems.
Copyright (C) 2009-2024 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef AARCH64_TDEP_H
#define AARCH64_TDEP_H
#include "arch/aarch64.h"
#include "displaced-stepping.h"
#include "infrun.h"
#include "gdbarch.h"
/* Forward declarations. */
struct gdbarch;
struct regset;
/* AArch64 Dwarf register numbering. */
#define AARCH64_DWARF_X0 0
#define AARCH64_DWARF_SP 31
#define AARCH64_DWARF_PC 32
#define AARCH64_DWARF_RA_SIGN_STATE 34
#define AARCH64_DWARF_V0 64
#define AARCH64_DWARF_SVE_VG 46
#define AARCH64_DWARF_SVE_FFR 47
#define AARCH64_DWARF_SVE_P0 48
#define AARCH64_DWARF_SVE_Z0 96
/* Size of integer registers. */
#define X_REGISTER_SIZE 8
#define B_REGISTER_SIZE 1
#define H_REGISTER_SIZE 2
#define S_REGISTER_SIZE 4
#define D_REGISTER_SIZE 8
#define Q_REGISTER_SIZE 16
/* Total number of general (X) registers. */
#define AARCH64_X_REGISTER_COUNT 32
/* Total number of D registers. */
#define AARCH64_D_REGISTER_COUNT 32
/* The maximum number of modified instructions generated for one
single-stepped instruction. */
#define AARCH64_DISPLACED_MODIFIED_INSNS 1
/* Target-dependent structure in gdbarch. */
struct aarch64_gdbarch_tdep : gdbarch_tdep_base
{
/* Lowest address at which instructions will appear. */
CORE_ADDR lowest_pc = 0;
/* Offset to PC value in jump buffer. If this is negative, longjmp
support will be disabled. */
int jb_pc = 0;
/* And the size of each entry in the buf. */
size_t jb_elt_size = 0;
/* Types for AdvSISD registers. */
struct type *vnq_type = nullptr;
struct type *vnd_type = nullptr;
struct type *vns_type = nullptr;
struct type *vnh_type = nullptr;
struct type *vnb_type = nullptr;
struct type *vnv_type = nullptr;
/* Types for SME ZA tiles and tile slices pseudo-registers. */
struct type *sme_tile_type_q = nullptr;
struct type *sme_tile_type_d = nullptr;
struct type *sme_tile_type_s = nullptr;
struct type *sme_tile_type_h = nullptr;
struct type *sme_tile_type_b = nullptr;
struct type *sme_tile_slice_type_q = nullptr;
struct type *sme_tile_slice_type_d = nullptr;
struct type *sme_tile_slice_type_s = nullptr;
struct type *sme_tile_slice_type_h = nullptr;
struct type *sme_tile_slice_type_b = nullptr;
/* Vector of names for SME pseudo-registers. The number of elements is
different for each distinct svl value. */
std::vector<std::string> sme_pseudo_names;
/* syscall record. */
int (*aarch64_syscall_record) (struct regcache *regcache,
unsigned long svc_number) = nullptr;
/* The VQ value for SVE targets, or zero if SVE is not supported. */
uint64_t vq = 0;
/* Returns true if the target supports SVE. */
bool has_sve () const
{
return vq != 0;
}
int pauth_reg_base = 0;
/* Number of pauth masks. */
int pauth_reg_count = 0;
int ra_sign_state_regnum = 0;
/* Returns true if the target supports pauth. */
bool has_pauth () const
{
return pauth_reg_base != -1;
}
/* First MTE register. This is -1 if no MTE registers are available. */
int mte_reg_base = 0;
/* Returns true if the target supports MTE. */
bool has_mte () const
{
return mte_reg_base != -1;
}
/* TLS registers. This is -1 if the TLS registers are not available. */
int tls_regnum_base = 0;
int tls_register_count = 0;
bool has_tls() const
{
return tls_regnum_base != -1;
}
/* The W pseudo-registers. */
int w_pseudo_base = 0;
int w_pseudo_count = 0;
/* SME feature fields. */
/* Index of the first SME register. This is -1 if SME is not supported. */
int sme_reg_base = 0;
/* svg register index. */
int sme_svg_regnum = 0;
/* svcr register index. */
int sme_svcr_regnum = 0;
/* ZA register index. */
int sme_za_regnum = 0;
/* Index of the first SME pseudo-register. This is -1 if SME is not
supported. */
int sme_pseudo_base = 0;
/* Total number of SME pseudo-registers. */
int sme_pseudo_count = 0;
/* First tile slice pseudo-register index. */
int sme_tile_slice_pseudo_base = 0;
/* Total number of tile slice pseudo-registers. */
int sme_tile_slice_pseudo_count = 0;
/* First tile pseudo-register index. */
int sme_tile_pseudo_base = 0;
/* The streaming vector quotient (svq) for SME, or zero if SME is not
supported. */
size_t sme_svq = 0;
/* Return true if the target supports SME, and false otherwise. */
bool has_sme () const
{
return sme_svq != 0;
}
/* Index of the SME2 ZT0 register. This is -1 if SME2 is not
supported. */
int sme2_zt0_regnum = -1;
/* Return true if the target supports SME2, and false otherwise. */
bool has_sme2 () const
{
return sme2_zt0_regnum > 0;
}
};
const target_desc *aarch64_read_description (const aarch64_features &features);
aarch64_features
aarch64_features_from_target_desc (const struct target_desc *tdesc);
extern int aarch64_process_record (struct gdbarch *gdbarch,
struct regcache *regcache, CORE_ADDR addr);
displaced_step_copy_insn_closure_up
aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch,
CORE_ADDR from, CORE_ADDR to,
struct regcache *regs);
void aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
displaced_step_copy_insn_closure *dsc,
CORE_ADDR from, CORE_ADDR to,
struct regcache *regs, bool completed_p);
bool aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch);
std::optional<CORE_ADDR> aarch64_mte_get_atag (CORE_ADDR address);
#endif /* aarch64-tdep.h */
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