?? math_emulate.c
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/* * 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);}
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