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39bfb9373c
Previously VQ was of type long. Using uint64_t ensures it always matches the same type as the VG register. Note that in the Linux kernel, VQ is 16bits. We cast it up to 64bits immediately after reading to ensure we always use the same type throughout the code. gdb/ * aarch64-tdep.c (aarch64_read_description): Use uint64_t for VQ. * aarch64-tdep.h (aarch64_read_description): Likewise. * arch/aarch64.c (aarch64_create_target_description): Likewise. * arch/aarch64.h (aarch64_create_target_description): Likewise. * features/aarch64-sve.c (create_feature_aarch64_sve): Likewise. * nat/aarch64-sve-linux-ptrace.c(aarch64_sve_get_vq): Likewise. * nat/aarch64-sve-linux-ptrace.h (aarch64_sve_get_vq): Likewise.
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* Common target dependent for AArch64 systems.
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Copyright (C) 2018 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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#include <sys/utsname.h>
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#include <sys/uio.h>
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#include "common-defs.h"
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#include "elf/external.h"
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#include "elf/common.h"
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#include "aarch64-sve-linux-ptrace.h"
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#include "arch/aarch64.h"
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/* See nat/aarch64-sve-linux-ptrace.h. */
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uint64_t
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aarch64_sve_get_vq (int tid)
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{
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struct iovec iovec;
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struct user_sve_header header;
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iovec.iov_len = sizeof (header);
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iovec.iov_base = &header;
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/* Ptrace gives the vector length in bytes. Convert it to VQ, the number of
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128bit chunks in a Z register. We use VQ because 128bits is the minimum
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a Z register can increase in size. */
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if (ptrace (PTRACE_GETREGSET, tid, NT_ARM_SVE, &iovec) < 0)
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{
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/* SVE is not supported. */
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return 0;
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}
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long vq = sve_vq_from_vl (header.vl);
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if (!sve_vl_valid (header.vl))
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{
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warning (_("Invalid SVE state from kernel; SVE disabled."));
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return 0;
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}
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return vq;
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}
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