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0557d64d98
All instances of ->get() in arch/x86 switched; that might or might not be worth splitting up. Notes: * for xstateregs_get() the amount we want to store is determined at the boot time; see init_xstate_size() and update_regset_xstate_info() for details. task->thread.fpu.state.xsave ends with a flexible array member and the amount of data in it depends upon the FPU features supported/enabled. * fpregs_get() writes slightly less than full ->thread.fpu.state.fsave (the last word is not copied); we pass the full size of state.fsave and let membuf_write() trim to the amount declared by regset - __regset_get() will make sure that the space in buffer is no more than that. * copy_xstate_to_user() and its helpers are gone now. * fpregs_soft_get() was getting user_regset_copyout() arguments wrong. Since "x86: x86 user_regset math_emu" back in 2008... I really doubt that it's worth splitting out for -stable, though - you need a 486SX box for that to trigger... [Kevin's braino fix for copy_xstate_to_kernel() essentially duplicated here] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
22 lines
637 B
C
22 lines
637 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* FPU regset handling methods:
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*/
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#ifndef _ASM_X86_FPU_REGSET_H
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#define _ASM_X86_FPU_REGSET_H
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#include <linux/regset.h>
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extern user_regset_active_fn regset_fpregs_active, regset_xregset_fpregs_active;
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extern user_regset_get2_fn fpregs_get, xfpregs_get, fpregs_soft_get,
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xstateregs_get;
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extern user_regset_set_fn fpregs_set, xfpregs_set, fpregs_soft_set,
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xstateregs_set;
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/*
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* xstateregs_active == regset_fpregs_active. Please refer to the comment
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* at the definition of regset_fpregs_active.
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*/
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#define xstateregs_active regset_fpregs_active
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#endif /* _ASM_X86_FPU_REGSET_H */
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