Hi there,
I got a question about register constraint in kernel source.
Here is the cut of bios32_service()
597 __asm__("lcall (%%edi); cld"
598 : "=a" (return_code),
599 "=b" (address),
600 "=c" (length),
601 "=d" (entry)
602 : "" (service),
603 "1" (0),
604 "D" (&bios32_indirect));
In line 602, its register constraint is a NULL string. I can't find how
compiler arranges the registers in gcc.info.
Does anyone know the further information?
Kindly regards,
Roach
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