Messages in this thread |  | | From | Robert Kaiser <> | Subject | Re: Anybody got 2.4.0 running on a 386 ? | Date | Wed, 10 Jan 2001 00:44:03 +0100 |
| |
On Die, 09 Jan 2001 you wrote: > On Tue, 9 Jan 2001, Robert Kaiser wrote: > > > Now comes the amazing (to me) part: I split the above statement up into: > > > > temp = mk_pte_phys(__pa(vaddr), PAGE_KERNEL); > > *pte = temp; > > this is almost impossible (except some really weird compiler bug) - unless > the mem_map address is invalid. This could happen if your kernel image is > *just* too large. Do things improve if you disable eg. ext2fs support (i > know, but should be enough to boot).
Sorry, no ext2fs in this kernel (it is for a diskless embedded system). I seem to recall though that the problem at one point magically went away when I disabled the FPU emulation, but I have not been able to reproduce this recently, so I'm not sure. Making minor changes to the kernel code (such as adding/removing some test-prints) certainly does not affect the behavior.
> Or if that part is not mapped > correctly (which does happen sometimes as well).
What could I do to check/fix this ?
> > and are you sure it crashes there? [are you putting delays between your > printouts?]
I have put a "halting statement" (i.e. "while(1);") after my printouts to make sure execution does not go any further than that point. I moved this halting statement ahead in the code line by line until the crash would occur again. So, yes, I am pretty sure.
> > > where temp is declared "volatile pte_t". I inserted test-prints between the > > above two lines. Accoding to that, the _first_ line , i.e. the evaluation of the > > mk_pte_phys() macro is causing the crash! > > it accesses mem_map variable, which is near to the end of the kernel > image, so it could indeed something of that sort. An uncompressed kernel > image (including the data area) must not be bigger than 4MB (IIRC).
According to my System.map file, mem_map is at 0xc0244f78. Does that help ?
---------------------------------------------------------------- Robert Kaiser email: rkaiser@sysgo.de SYSGO RTS GmbH Am Pfaffenstein 14 phone: (49) 6136 9948-762 D-55270 Klein-Winternheim / Germany fax: (49) 6136 9948-10 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
|  |