On Wednesday, May 16, 2012 9:24:54 am Eric McCorkle wrote: > On 05/15/12 11:44, John Baldwin wrote: > > The i386 kernel assumes it starts out with a flat 32-bit mode with > > the kernel loaded into a contiguous memory region at a fixed > > physical address. If we need a relocatable kernel (as Marcel > > hinted at I think), then that adds a fair bit of complication. > > > > The amd64 kernel assumes it starts in long mode (the bootinfo64.c > > bits in the loader setup initial page tables, etc.). I think the > > amd64 kernel also has to be loaded into contiguous memory at a > > fixed physical address currently. > > > > Seems like an initial workaround could be to allocate a space big > enough for all the necessary ELF segments, and split it up ourselves. > > Do the kernel and modules actually do anything that depends on being > in a contiguous space in some way (ie some relocation trick)? Because > it seems like it shouldn't really matter otherwise.
They are statically linked at a fixed address. Modules can be wherever, but the kernel has to be at the physical address it is linked for (unless you make the kernel relocatable). -- John Baldwin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
