CVS log for src/sys/dev/kloader.c

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Keyword substitution: kv
Default branch: MAIN

Switch to kmem(9).

Sort headers.

Zero clear sh_offset to indicate a section is unused.

Avoid kernel text being doubly allocated due to non-zero sh_offset for
unused sections.

None of MD codes and kern_ksyms.c use sh_type == SHT_NULL (yet?) to
determine whether a section is unused.

Sync with HEAD.

Add containment for the cloning devices hack in vn_open.

Cloning devices (and also things like /dev/stderr) work by allocating
a struct file, stuffing it in the file table (which is a layer
violation), stuffing the file descriptor number for it in a magic
field of struct lwp (which is gross), and then "failing" with one of
two magic errnos, EDUPFD or EMOVEFD.

Before this commit, all callers of vn_open in the kernel (there are
quite a few) were expected to check for these errors and handle the
situation. Needless to say, none of them except for open() itself did,
resulting in internal negative errnos being returned to userspace.

This hack is fairly deeply rooted and cannot be eliminated all at
once. This commit adds logic to handle the magic errnos inside
vn_open; now on success vn_open returns either a vnode or an integer
file descriptor, along with a flag that says whether the underlying
code requested EDUPFD or EMOVEFD. Callers not prepared to cope with
file descriptors can pass NULL for the extra return values, in which
case if a file descriptor would be produced vn_open fails with
EOPNOTSUPP.

Since I'm rearranging vn_open's signature anyway, stop exposing struct
nameidata. Instead, take three arguments: an optional vnode to use as
the starting point (like openat()), the path, and additional namei
flags to use, restricted to NOCHROOT and TRYEMULROOT. (Other namei
behavior, e.g. NOFOLLOW, can be requested via the open flags.)

This change requires a kernel bump. Ride the one an hour ago.
(That was supposed to be coordinated; did not intend to let an hour
slip by. My fault.)

Round of uvm.h cleanup.

The poorly named uvm.h is generally supposed to be for uvm-internal
users only.

- Narrow it to files that actually need it -- mostly files that need
  to query whether curlwp is the pagedaemon, which should maybe be
  exposed by an external header.

- Use uvm_extern.h where feasible and uvm_*.h for things not exposed
  by it.  We should split up uvm_extern.h but this will serve for now
  to reduce the uvm.h dependencies.

- Use uvm_stat.h and #ifdef UVMHIST uvm.h for files that use
  UVMHIST(ubchist), since ubchist is declared in uvm.h but the
  reference evaporates if UVMHIST is not defined, so we reduce header
  file dependencies.

- Make uvm_device.h and uvm_swap.h independently includable while
  here.

ok chs@

update from HEAD

Sync with HEAD

Move declaration of avail_start, avail_end to <machine/kloader.h>

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

More alignment spellos

sync with head

add missing pathbuf_destroy on error path, noticed by enami

XXX: this code is wrong; it should not be calling namei and then
XXX: vn_open on the same nameidata.

Introduce struct pathbuf. This is an abstraction to hold a pathname
and the metadata required to interpret it. Callers of namei must now
create a pathbuf and pass it to NDINIT (instead of a string and a
uio_seg), then destroy the pathbuf after the namei session is
complete.

Update all namei call sites accordingly. Add a pathbuf(9) man page and
update namei(9).

The pathbuf interface also now appears in a couple of related
additional places that were passing string/uio_seg pairs that were
later fed into NDINIT. Update other call sites accordingly.

kloader(4) accesses vm_page, pull in uvm/uvm.h.

Sync with HEAD.

sync with head.

sync with head

Clean up vnode lock operations pass 2:

VOP_UNLOCK(vp, flags) -> VOP_UNLOCK(vp): Remove the unneeded flags argument.

Welcome to 5.99.32.

Discussed on tech-kern.

sync with head

KNF.

XXX This should use bus_dma(9).

Use PRIxVADDR

Fixup (all but mipsco) to deal the new realities in mipsland.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

Ansify function definitions w/o arguments. Generated with sed.

Sync w/ -current. 34 merge conflicts to follow.

sync with head.

Sync with HEAD.

Also fix build.

vm_page: put TAILQ_ENTRY into a union with LIST_ENTRY, so we can use both.

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

Sync with HEAD.

sync with head.

Catch up with descriptor handling changes. See kern_descrip.c revision
1.173 for details.

sync with head

sync with HEAD

Sync with HEAD

Sync with head.

__FUNCTION__ -> __func__

sync with head.

Remove a now-unused local variable.

Sync with HEAD.

Remove cn_lwp from struct componentname.  curlwp should be used
from on.  The NDINIT() macro no longer takes the lwp parameter and
associates the credentials of the calling thread with the namei
structure.

- sync with head.
- move sched_changepri back to kern_synch.c as it doesn't know PPQ anymore.

sync with head.

Replace the Mach-derived boolean_t type with the C99 bool type.  A
future commit will replace use of TRUE and FALSE with true and false.

sync with head.

sync with head

sync with head

- Use the LWP cached credentials where sane.
- Minor cosmetic changes.

sync with head.

Sync with head.

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

sync with head.

integrate kauth.

Adapt to kernel authorization KPI.

sync with head.

Use uintN_t.

sync with head.

In kloader_open print errno if namei or vn_open fail.
Use consistent style for error messages.
While here, return NULL instead on 0 on error.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

Remove the casts in the previous commit and use %zx.

Thanks to Simon Burge for pointing this out.

Add casts to make this compile when KLOADER_DEBUG is defined.

Fix two typos.

Preserve const in cast.

Adapt to branch.

Fix the sync with head I botched.

Sync with HEAD.

There's no need to pass a proc value when using UIO_SYSSPACE with
vn_rdwr(9) and uiomove(9).

OK'd by Jason Thorpe

Sync with HEAD

file kloader.c was added on branch ktrace-lwp on 2004-08-03 10:44:54 +0000

MI part of kloader moved to dev/kloader.c from arch/hpc/hpc/
dreamcast and playstation2 port are changed to use this.