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/* Common native Linux definitions for the AArch64 scalable
extensions: SVE and SME.
Copyright (C) 2018-2024 Free Software Foundation, Inc.
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 NAT_AARCH64_SCALABLE_LINUX_PTRACE_H
#define NAT_AARCH64_SCALABLE_LINUX_PTRACE_H
#include <signal.h>
#include <sys/utsname.h>
/* The order in which <sys/ptrace.h> and <asm/ptrace.h> are included
can be important. <sys/ptrace.h> often declares various PTRACE_*
enums. <asm/ptrace.h> often defines preprocessor constants for
these very same symbols. When that's the case, build errors will
result when <asm/ptrace.h> is included before <sys/ptrace.h>. */
#include <sys/ptrace.h>
#include <asm/ptrace.h>
#include <stdarg.h>
#include "aarch64-scalable-linux-sigcontext.h"
/* Indicates whether a SVE ptrace header is followed by SVE registers or a
fpsimd structure. */
#define HAS_SVE_STATE(header) ((header).flags & SVE_PT_REGS_SVE)
/* Return true if there is an active SVE state in TID.
Return false otherwise. */
bool aarch64_has_sve_state (int tid);
/* Return true if there is an active SSVE state in TID.
Return false otherwise. */
bool aarch64_has_ssve_state (int tid);
/* Return true if there is an active ZA state in TID.
Return false otherwise. */
bool aarch64_has_za_state (int tid);
/* Given TID, read the SVE header into HEADER.
Return true if successful, false otherwise. */
bool read_sve_header (int tid, struct user_sve_header &header);
/* Given TID, store the SVE HEADER.
Return true if successful, false otherwise. */
bool write_sve_header (int tid, const struct user_sve_header &header);
/* Given TID, read the SSVE header into HEADER.
Return true if successful, false otherwise. */
bool read_ssve_header (int tid, struct user_sve_header &header);
/* Given TID, store the SSVE HEADER.
Return true if successful, false otherwise. */
bool write_ssve_header (int tid, const struct user_sve_header &header);
/* Given TID, read the ZA header into HEADER.
Return true if successful, false otherwise. */
bool read_za_header (int tid, struct user_za_header &header);
/* Given TID, store the ZA HEADER.
Return true if successful, false otherwise. */
bool write_za_header (int tid, const struct user_za_header &header);
/* Read VQ for the given tid using ptrace. If SVE is not supported then zero
is returned (on a system that supports SVE, then VQ cannot be zero). */
uint64_t aarch64_sve_get_vq (int tid);
/* Set VQ in the kernel for the given tid, using either the value VQ or
reading from the register VG in the register buffer. */
bool aarch64_sve_set_vq (int tid, uint64_t vq);
bool aarch64_sve_set_vq (int tid, struct reg_buffer_common *reg_buf);
/* Read the streaming mode vq (svq) for the given TID. If the ZA state is not
supported or active, return 0. */
uint64_t aarch64_za_get_svq (int tid);
/* Set the vector quotient (vq) in the kernel for the given TID using the
value VQ.
Return true if successful, false otherwise. */
bool aarch64_za_set_svq (int tid, uint64_t vq);
bool aarch64_za_set_svq (int tid, const struct reg_buffer_common *reg_buf,
int svg_regnum);
/* Given TID, return the SVE/SSVE data as a vector of bytes. */
extern gdb::byte_vector aarch64_fetch_sve_regset (int tid);
/* Write the SVE/SSVE contents from SVE_STATE to TID. */
extern void aarch64_store_sve_regset (int tid,
const gdb::byte_vector &sve_state);
/* Given TID, return the ZA data as a vector of bytes. */
extern gdb::byte_vector aarch64_fetch_za_regset (int tid);
/* Write ZA_STATE for TID. */
extern void aarch64_store_za_regset (int tid, const gdb::byte_vector &za_state);
/* Given TID, initialize the ZA register set so the header contains the right
size. The bytes of the ZA register are initialized to zero. */
extern void aarch64_initialize_za_regset (int tid);
/* Given TID, return the NT_ARM_ZT register set data as a vector of bytes. */
extern gdb::byte_vector aarch64_fetch_zt_regset (int tid);
/* Write ZT_STATE for TID. */
extern void aarch64_store_zt_regset (int tid, const gdb::byte_vector &zt_state);
/* Return TRUE if thread TID supports the NT_ARM_ZT register set.
Return FALSE otherwise. */
extern bool supports_zt_registers (int tid);
/* Given a register buffer REG_BUF, update it with SVE/SSVE register data
from SVE_STATE. */
extern void
aarch64_sve_regs_copy_to_reg_buf (int tid, struct reg_buffer_common *reg_buf);
/* Given a thread id TID and a register buffer REG_BUF containing SVE/SSVE
register data, write the SVE data to thread TID. */
extern void
aarch64_sve_regs_copy_from_reg_buf (int tid,
struct reg_buffer_common *reg_buf);
/* Given a thread id TID and a register buffer REG_BUF, update the register
buffer with the ZA state from thread TID.
ZA_REGNUM, SVG_REGNUM and SVCR_REGNUM are the register numbers for ZA,
SVG and SVCR registers. */
extern void aarch64_za_regs_copy_to_reg_buf (int tid,
struct reg_buffer_common *reg_buf,
int za_regnum, int svg_regnum,
int svcr_regnum);
/* Given a thread id TID and a register buffer REG_BUF containing ZA register
data, write the ZA data to thread TID.
ZA_REGNUM, SVG_REGNUM and SVCR_REGNUM are the register numbers for ZA,
SVG and SVCR registers. */
extern void
aarch64_za_regs_copy_from_reg_buf (int tid,
struct reg_buffer_common *reg_buf,
int za_regnum, int svg_regnum,
int svcr_regnum);
/* Given a thread id TID and a register buffer REG_BUF, update the register
buffer with the ZT register set state from thread TID.
ZT_REGNUM is the register number for ZT0. */
extern void
aarch64_zt_regs_copy_to_reg_buf (int tid, struct reg_buffer_common *reg_buf,
int zt_regnum);
/* Given a thread id TID and a register buffer REG_BUF containing the ZT
register set state, write the ZT data to thread TID.
ZT_REGNUM is the register number for ZT0. */
extern void
aarch64_zt_regs_copy_from_reg_buf (int tid, struct reg_buffer_common *reg_buf,
int zt_regnum);
#endif /* NAT_AARCH64_SCALABLE_LINUX_PTRACE_H */
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