Commit 63d6bdf3 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Borislav Petkov
Browse files

x86/math-emu: Convert to fpstate 



Convert math emulation code to the new register storage
mechanism in preparation for dynamically sized buffers.

No functional change.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211013145322.711347464@linutronix.de
parent c20942ce

arch/x86/math-emu/fpu_aux.c

+1 −1
Original line number Diff line number Diff line
@@ -53,7 +53,7 @@ void fpstate_init_soft(struct swregs_state *soft) 


void finit(void)

{

	fpstate_init_soft(&current->thread.fpu.state.soft);

	fpstate_init_soft(&current->thread.fpu.fpstate->regs.soft);

}



/*

arch/x86/math-emu/fpu_entry.c

+2 −2
Original line number Diff line number Diff line
@@ -640,7 +640,7 @@ int fpregs_soft_set(struct task_struct *target, 
		    unsigned int pos, unsigned int count,

		    const void *kbuf, const void __user *ubuf)

{

	struct swregs_state *s387 = &target->thread.fpu.state.soft;

	struct swregs_state *s387 = &target->thread.fpu.fpstate->regs.soft;

	void *space = s387->st_space;

	int ret;

	int offset, other, i, tags, regnr, tag, newtop;
@@ -691,7 +691,7 @@ int fpregs_soft_get(struct task_struct *target, 
		    const struct user_regset *regset,

		    struct membuf to)

{

	struct swregs_state *s387 = &target->thread.fpu.state.soft;

	struct swregs_state *s387 = &target->thread.fpu.fpstate->regs.soft;

	const void *space = s387->st_space;

	int offset = (S387->ftop & 7) * 10, other = 80 - offset;

arch/x86/math-emu/fpu_system.h

+1 −1
Original line number Diff line number Diff line
@@ -73,7 +73,7 @@ static inline bool seg_writable(struct desc_struct *d) 
	return (d->type & SEG_TYPE_EXECUTE_MASK) == SEG_TYPE_WRITABLE;

}



#define I387			(&current->thread.fpu.state)

#define I387			(&current->thread.fpu.fpstate->regs)

#define FPU_info		(I387->soft.info)



#define FPU_CS			(*(unsigned short *) &(FPU_info->regs->cs))