Messages in this thread | | | Date | Fri, 15 Oct 1999 11:35:22 -0400 | From | Brian Gerst <> | Subject | Re: bootsect.S changes |
| |
Richard B. Johnson wrote: > I think this is still a 'work in progress'. I hope that somebody adds > a directive to gas that tells it to assemble 16-bit code so the source > code doesn't have to be wrong to get it to make 16-bit code. The > prefix 0x66 is a switch. It changes the default oprand size of the > processor. If the processor is in 32-bit mode, 0x66 is used to make > it do word, instead of longword operations. If the processor is > in 16-bit mode, 0x66 prefix makes it do longword instead of the default > word operations. Therefore, an assembler needs to 'know' when to > not use 0x66. In other words it needs to know the current operation > mode of the processor. > > Maybe a switch like ".i-32" (Intel 32-bit) ".i-16" (Intel 16-bit) > needs to be added to GAS. >
It's already there: .code16 and .code32
--
Brian Gerst
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |