34 lines
635 B
C
34 lines
635 B
C
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/*
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* When in kernel-mode, we cannot use printf, as fs is liable to
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* point to 'interesting' things. Make a printf with fs-saving, and
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* all is well.
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include <linux/kernel.h>
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static char buf[1024];
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int printk(const char *fmt, ...)
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{
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va_list args;
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int i;
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va_start(args, fmt);
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i=vsprintf(buf,fmt,args);
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va_end(args);
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__asm__("push %%fs\n\t"
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"push %%ds\n\t"
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"pop %%fs\n\t"
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"pushl %0\n\t"
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"pushl $_buf\n\t"
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"pushl $0\n\t"
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"call _tty_write\n\t"
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"addl $8,%%esp\n\t"
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"popl %0\n\t"
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"pop %%fs"
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::"r" (i):"ax","cx","dx");
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return i;
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}
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