asm/fpu/signal.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * x86 FPU signal frame handling methods:
0004  */
0005 #ifndef _ASM_X86_FPU_SIGNAL_H
0006 #define _ASM_X86_FPU_SIGNAL_H
0007
0008 #include <linux/compat.h>
0009 #include <linux/user.h>
0010
0011 #include <asm/fpu/types.h>
0012
0013 #ifdef CONFIG_X86_64
0014 # include <uapi/asm/sigcontext.h>
0015 # include <asm/user32.h>
0016 struct ksignal;
0017 int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
0018             compat_sigset_t *set, struct pt_regs *regs);
0019 int ia32_setup_frame(int sig, struct ksignal *ksig,
0020              compat_sigset_t *set, struct pt_regs *regs);
0021 #else
0022 # define user_i387_ia32_struct  user_i387_struct
0023 # define user32_fxsr_struct user_fxsr_struct
0024 # define ia32_setup_frame   __setup_frame
0025 # define ia32_setup_rt_frame    __setup_rt_frame
0026 #endif
0027
0028 extern void convert_from_fxsr(struct user_i387_ia32_struct *env,
0029                   struct task_struct *tsk);
0030 extern void convert_to_fxsr(struct fxregs_state *fxsave,
0031                 const struct user_i387_ia32_struct *env);
0032
0033 unsigned long
0034 fpu__alloc_mathframe(unsigned long sp, int ia32_frame,
0035              unsigned long *buf_fx, unsigned long *size);
0036
0037 unsigned long fpu__get_fpstate_size(void);
0038
0039 extern bool copy_fpstate_to_sigframe(void __user *buf, void __user *fp, int size);
0040 extern void fpu__clear_user_states(struct fpu *fpu);
0041 extern bool fpu__restore_sig(void __user *buf, int ia32_frame);
0042
0043 extern void restore_fpregs_from_fpstate(struct fpstate *fpstate, u64 mask);
0044 #endif /* _ASM_X86_FPU_SIGNAL_H */