Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\fpu\regset.c Create Date:2022-07-28 07:49:38
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:xfpregs_get

Proto:int xfpregs_get(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)

Type:int

Parameter:

TypeParameterName
struct task_struct *target
const struct user_regset *regset
unsigned intpos
unsigned intcount
void *kbuf
void __user *ubuf
33  fpu = Floating point and extended processor state
35  If Not boot_cpu_has(FXSAVE/FXRSTOR, CR4.OSFXSR ) Then Return -ENODEV
38  This function must be called before we read a task's fpstate
39  When executing XSAVEOPT (or other optimized XSAVE instructions), if* a processor implementation detects that an FPU state component is still* (or is again) in its initialized state, it may clear the corresponding* bit in the header
41  Return These are helpers for writing regset get/set functions in arch code