reserve some more space for the BSS section than the binary says. This
trick was used to leave room after the kernel's image to copy the symbol
table following the format required by ksyms_init. (It was also used to
workaround a bug in the physical address fields of the binary, but this has
been long fixed.) Yes, the MULTIBOOT_SYMTAB_SPACE option goes away; yay!
Instead, copy the required data after the kernel in a way that avoids having
to reserve space and use the new ksyms_init_explicit function to avoid the
need to construct a minimal ELF image.
Fixes ksyms when using an "unpatched" GRUB (one that does not contain the
fix to honour the "a.out kludge" for ELF images, even when present) -- i.e.
ddb and lkms. As a side effect, the new code is much clearer to read and
digest.
Closes PR port-i386/32865.
exact address of the symtab and strtab ELF sections contents beforehand.
This will be used in i386's Multiboot code to add the initial kernel ksyms
without having to prepare a minimal ELF image that matches the format
expected by the reguluar ksyms_init function.
This part was reviewed by cube@ and successfully passes a full i386 release
build.
all waiters *before* trying to get the syncer lock necessary for
dounmount(). This prevents a deadlock if the userspace server dies
while the syncer is running.
- fix several comments to reality
- clean up the #ifdef NO_VCACHE code slightly
- use call instead of set/jmpl
- remove a couple of unnecessary stores to curlwp
for the disk.
- Add a new function, disk_ioctl(), that does generic disk ioctl handling.
DIOCGDISKINFO is handled here now, and others will be added in the future.
- In the wd driver, fill in the dk_info member of struct disk and use the
new disk_ioctl() function.
Make some "#ifdef DIAGNOSTIC" blocks always compiled in; others
convert to KASSERT() where appropriate.
Add some sanity checks and comments while here.
do not add the offset to the result - the calculated PA is the right
value - not the start of the page as in the other cases.
This fixes DMA to kernel stack, and avoids "fabricating a geometry"
warnings.
After a rmdir()ed directory has been truncated, force an update of
the directory's inode after queuing the dirrem that will decrement
the parent directory's link count. This will force the update of
the parent directory's actual link to actually be scheduled. Without
this change the parent directory's actual link count would not be
updated until ufs_inactive() cleared the inode of the newly removed
directory, which might be deferred indefinitely. ufs_inactive()
will not be called as long as any process holds a reference to the
removed directory, and ufs_inactive() will not clear the inode if
the link count is non-zero, which could be the result of an earlier
system crash.
[plus description about problems woth background fsck solved
by this; irrelevant to NetBSD]
For me, the good effect is at least that I'm getting less filesystem
inconsistencies after a crash.
Approved by christos quite a while ago.
make local variable const as well. Avoid writing to the now-const
variable, instead do the masking before in the trapframe register
assignment.
OK'ed by thorpej and nathanw.
Add _lwp_getspecific_by_lwp() to get lwp specific data from other lwp's.
Protected by #ifdef _LWP_API_PRIVATE.
Approved by: Jason Thorpe <thorpej@netbsd.org>
getnewvnode() while holding on to any vnode lock deadlocks the
system if the file system is being forcibly unmounted.
Normal file systems don't trigger this problem because of two reaons:
1) they don't hold on to vnode locks while idling who-knows-where, so
the race doesn't trigger
2) they aren't usually unmounted with FORCE; puffs is, in case "someone"
manages to make a crashy userspace server
Nevertheless, a real solution is slowly being braised.
jmmv