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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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