/* * linux/kernel/math/math_emulate.c * * (C) 1991 Linus Torvalds *//* * This directory should contain the math-emulation code. * Currently only results in a signal. */#include <signal.h>#include <linux/sched.h>#include <linux/kernel.h>#include <asm/segment.h>void math_emulate(long edi, long esi, long ebp, long sys_call_ret,	long eax,long ebx,long ecx,long edx,	unsigned short fs,unsigned short es,unsigned short ds,	unsigned long eip,unsigned short cs,unsigned long eflags,	unsigned short ss, unsigned long esp){	unsigned char first, second;/* 0x0007 means user code space */	if (cs != 0x000F) {		printk("math_emulate: %04x:%08x\n\r",cs,eip);		panic("Math emulation needed in kernel");	}	first = get_fs_byte((char *)((*&eip)++));	second = get_fs_byte((char *)((*&eip)++));	printk("%04x:%08x %02x %02x\n\r",cs,eip-2,first,second);	current->signal |= 1<<(SIGFPE-1);}void math_error(void){	__asm__("fnclex");	if (last_task_used_math)		last_task_used_math->signal |= 1<<(SIGFPE-1);}