forked from Imagelibrary/binutils-gdb
d01e823438
This updates the copyright headers to include 2025. I did this by running gdb/copyright.py and then manually modifying a few files as noted by the script. Approved-By: Eli Zaretskii <eliz@gnu.org>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/* x86 XSAVE extended state functions.
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Copyright (C) 2022-2025 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 "gdbsupport/x86-xstate.h"
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#include "nat/x86-cpuid.h"
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#include "nat/x86-xstate.h"
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/* Fetch the offset of a specific XSAVE extended region. */
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static int
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xsave_feature_offset (uint64_t xcr0, int feature)
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{
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uint32_t ebx;
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if ((xcr0 & (1ULL << feature)) == 0)
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return 0;
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if (!x86_cpuid_count (0xd, feature, nullptr, &ebx, nullptr, nullptr))
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return 0;
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return ebx;
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}
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/* See x86-xstate.h. */
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int
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x86_xsave_length ()
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{
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uint32_t ebx;
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if (!x86_cpuid_count (0xd, 0, nullptr, &ebx, nullptr, nullptr))
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return 0;
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return ebx;
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}
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/* See x86-xstate.h. */
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x86_xsave_layout
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x86_fetch_xsave_layout (uint64_t xcr0, int len)
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{
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x86_xsave_layout layout;
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layout.sizeof_xsave = len;
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layout.avx_offset = xsave_feature_offset (xcr0, X86_XSTATE_AVX_ID);
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layout.k_offset = xsave_feature_offset (xcr0, X86_XSTATE_K_ID);
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layout.zmm_h_offset = xsave_feature_offset (xcr0, X86_XSTATE_ZMM_H_ID);
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layout.zmm_offset = xsave_feature_offset (xcr0, X86_XSTATE_ZMM_ID);
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layout.pkru_offset = xsave_feature_offset (xcr0, X86_XSTATE_PKRU_ID);
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return layout;
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}
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