Date: Sat, 28 Nov 1998 15:49:40 -0800 From: "Alec Wolman" <wolman@cs.washington.edu> To: freebsd-current@FreeBSD.ORG Subject: MAXDSIZ limit Message-ID: <199811282349.PAA16757@miles.cs.washington.edu>
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Hello,
I'm running FreeBSD 3.0-19981103 SNAP, and I'm running into a problem
or two. I first tried changing MAXDSIZE in my kernel config file to
MAXDSIZ 2048*1024*1024
This causes numerous compilation warnings, presumably because the
calculations being done with the number are signed rather than unsigned.
Setting it to 2000*1024*1024 eliminates all of those warnings except
for one, in imgact_elf.c. I tried booting this kernel, but it dies.
I don't have the exact error message, but the kernel boots up and
manages to go through the device configuration, but when it gets to
execing an elf process things go haywire. I think the error message
had to do with being unable to start getty.
When I fixed the compiler warning with the following change,
and I changed MAXDSIZ to 1500*1024*1024, and rebooted, then things
seemed to work ok. However, I suspect that lowering MAXDSIZ rather
than fixing the code is what made things better. Does anyone here
understand why the elf code needs to multiply MAXDSIZ by 2 and then
use that as a base address for something else? Is anyone with a
bit more expertise interested in looking into this problem?
Thanks,
Alec
*** imgact_elf.c~ Sun Oct 25 09:44:50 1998
--- imgact_elf.c Sat Nov 28 15:22:28 1998
***************
*** 498,504 ****
vmspace->vm_dsize = data_size >> PAGE_SHIFT;
vmspace->vm_daddr = (caddr_t)(uintptr_t)data_addr;
! addr = 2L*MAXDSIZ; /* May depend on OS type XXX */
imgp->entry_addr = entry;
--- 498,504 ----
vmspace->vm_dsize = data_size >> PAGE_SHIFT;
vmspace->vm_daddr = (caddr_t)(uintptr_t)data_addr;
! addr = 2UL*(unsigned)MAXDSIZ; /* May depend on OS type XXX */
imgp->entry_addr = entry;
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