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When writing registers to the kernel, check if regcache VG has been changed. If so then update the thread's vector length, then write back the registers. When reading registers from the kernel, ensure regcache VG register is updated. The regcache registers should already be of the correct length. Remove all the checks that error if the vector length has changed. gdb/ChangeLog: * aarch64-linux-nat.c (store_sveregs_to_thread): Set vector length. * nat/aarch64-sve-linux-ptrace.c (aarch64_sve_set_vq): New function. (aarch64_sve_regs_copy_to_reg_buf): Remove VG checks. (aarch64_sve_regs_copy_from_reg_buf): Likewise. * nat/aarch64-sve-linux-ptrace.h (aarch64_sve_set_vq): New declaration.
67 lines
2.3 KiB
C++
67 lines
2.3 KiB
C++
/* Common target dependent for AArch64 systems.
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Copyright (C) 2018-2019 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef NAT_AARCH64_SVE_LINUX_PTRACE_H
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#define NAT_AARCH64_SVE_LINUX_PTRACE_H
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#include <signal.h>
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#include <sys/utsname.h>
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#include <sys/ptrace.h>
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#include <asm/ptrace.h>
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#ifndef SVE_SIG_ZREGS_SIZE
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#include "aarch64-sve-linux-sigcontext.h"
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#endif
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/* Indicates whether a SVE ptrace header is followed by SVE registers or a
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fpsimd structure. */
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#define HAS_SVE_STATE(header) ((header).flags & SVE_PT_REGS_SVE)
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/* Read VQ for the given tid using ptrace. If SVE is not supported then zero
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is returned (on a system that supports SVE, then VQ cannot be zero). */
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uint64_t aarch64_sve_get_vq (int tid);
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/* Set VQ in the kernel for the given tid, using either the value VQ or
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reading from the register VG in the register buffer. */
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bool aarch64_sve_set_vq (int tid, uint64_t vq);
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bool aarch64_sve_set_vq (int tid, struct reg_buffer_common *reg_buf);
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/* Read the current SVE register set using ptrace, allocating space as
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required. */
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extern std::unique_ptr<gdb_byte[]> aarch64_sve_get_sveregs (int tid);
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/* Put the registers from linux structure buf into register buffer. Assumes the
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vector lengths in the register buffer match the size in the kernel. */
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extern void aarch64_sve_regs_copy_to_reg_buf (struct reg_buffer_common *reg_buf,
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const void *buf);
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/* Put the registers from register buffer into linux structure buf. Assumes the
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vector lengths in the register buffer match the size in the kernel. */
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extern void
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aarch64_sve_regs_copy_from_reg_buf (const struct reg_buffer_common *reg_buf,
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void *buf);
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#endif /* NAT_AARCH64_SVE_LINUX_PTRACE_H */
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