On 24/11/16 21:26, vincent@xxxxxxxxxx wrote: > A while back I stumbled onto an old post talking about the 'Illegal > instruction' issue with SILO on serengeti machines: > > http://helenos-blog.pavel-rimsky.cz/?p=3 > > Any thoughts? > > Note that I have not personally verified that it works or not (I sold my > US-IIICu sb2k some time ago already...) > > My 2c, > > Vincent FWIW we have a similar hack in OpenBIOS for a.out binaries which rears its head when trying to boot NextSTEP in QEMU: https://github.com/openbios/openbios/blob/master/libopenbios/aout_load.c. For a.out binaries we relocate the binary back down over its header after load so we can execute directly at 0x4000 (load-base). This was modelled after observing similar code in the official Sun OpenBOOT implementation of init-program which can be found here: https://github.com/openbios/openboot/blob/master/obp/arch/sun4u/go.fth. Probably the first thing to check is that the a.out magic is being generated correctly in SILO to match the above code in order to trigger the relocation, which in itself is likely a hold-over from the very early days of OpenBOOT. ATB, Mark. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
