FreeBSD x86 nat: Use register maps for GP register sets.
Rather than using the x86-specific register offset tables, use
register maps to describe the layout of the general purpose registers
fetched via PT_GETREGS. The sole user-visible difference is that
FreeBSD/amd64 will now report additional segment registers ($ds, $es,
$fs, and $gs) for both 32-bit and 64-bit processes.
As part of these changes, the FreeBSD x86 native targets no longer use
amd64-bsd-nat.c or i386-bsd-nat.c. Remove FreeBSD-specific register
handling (for $fs_base, $gs_base, and XSAVE state) from these files.
Similarly, remove the global x86bsd_xsave_len from x86-bsd-nat.c. The
FreeBSD x86 native targets use a static xsave_len instead.
While here, rework the probing of PT_GETXMMREGS on FreeBSD/i386.
Probe the ptrace op once in the target read_description method and
cache the result for the future similar to the way the status of XSAVE
support is probed in the read_description method. In addition, return
the proper xcr0 mask (X87-only) for old kernels or systems without
either XSAVE or XMM support.
2022-01-29 03:14:37 +08:00
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/* FreeBSD/amd64 target support, prototypes.
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2023-01-01 20:49:04 +08:00
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Copyright (C) 2021-2023 Free Software Foundation, Inc.
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FreeBSD x86 nat: Use register maps for GP register sets.
Rather than using the x86-specific register offset tables, use
register maps to describe the layout of the general purpose registers
fetched via PT_GETREGS. The sole user-visible difference is that
FreeBSD/amd64 will now report additional segment registers ($ds, $es,
$fs, and $gs) for both 32-bit and 64-bit processes.
As part of these changes, the FreeBSD x86 native targets no longer use
amd64-bsd-nat.c or i386-bsd-nat.c. Remove FreeBSD-specific register
handling (for $fs_base, $gs_base, and XSAVE state) from these files.
Similarly, remove the global x86bsd_xsave_len from x86-bsd-nat.c. The
FreeBSD x86 native targets use a static xsave_len instead.
While here, rework the probing of PT_GETXMMREGS on FreeBSD/i386.
Probe the ptrace op once in the target read_description method and
cache the result for the future similar to the way the status of XSAVE
support is probed in the read_description method. In addition, return
the proper xcr0 mask (X87-only) for old kernels or systems without
either XSAVE or XMM support.
2022-01-29 03:14:37 +08:00
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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 AMD64_FBSD_TDEP_H
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#define AMD64_FBSD_TDEP_H
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#include "regset.h"
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extern const struct regset amd64_fbsd_gregset;
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#endif /* AMD64_FBSD_TDEP_H */
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