Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r256650: kldxref: Add static keyword to the new function only used in the
same file.

The WARNS level is not such that the omission broke the build.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

kldxref: Do not depend on the directory order.

Sort the filenames to get a consistent result between machines of the same
architecture.

Also, sort FTS_D entries after other entries so kldxref -R works properly in
the uncommon case that a directory contains both subdirectories and modules.
Previously, this may have happened to work, depending on the order of files
in the directory.

PR: bin/182098
Submitted by: Derek Schrock (original version)
Tested by: Derek Schrock
Approved by: re (delphij)
MFC after: 1 week

Remove unneeded reference to link.h (sys/link_elf.h).

MFC after: 2 weeks

various cleanups including:
+ check a possible buffer overflow when creating a temp file,
submitted by Christoph Mallon
+ remove stale struct definitions
+ clarify the use of dflag and remove useless checks

MFC after: 3 days

Make the linker.hints file have mode 644 instead of 600.
There is nothing secret in the file, and the missing read
permission breaks diskless operation.

MFC after: 4 weeks

Use safe strlcpy rather than unsafe strncpy. After marcel's last fix,
there was still one overflow possible. strlcpy is faster anyway
because it doesn't unexpectedly zero the entire length of the string
when copying short strings....

Fix (static) buffer overflow bug. The dest buffer is of size MAXPATHLEN,
so dest[MAXPATHLEN] falls outside the buffer. This bug corrupted
arenas[0] defined in libc's malloc.c on PowerPC when kldxref is shared,
which triggered a delayed SIGSERV.

Change maketempfile() to return a FILE* so as to eliminate the fopen()
that immediately follows the only call to it. maketempfile() uses
mkstemp(), so the temporary file has already been opened and using
fopen() again just opens the file twice. This also fixes the invalid
mode used on the fopen().
While here, assign NULL to fxref after fclose() because we test for
fxref being !NULL to determine if we have the (temporary) hints file
open.

Skip .symbols files.

Add support for reading ELF relocatable object file format modules.

Call the file format specific code through a table of function
pointers and remove knowledge of the file format from kldxref.c.
This will make it possible to support more than one file format.

Fixed manpage's synopsis, and synchronized it with the program's usage().

Check that specified in the command line path is actually a directory,
otherwise we are risking to coredump later on.

Remove bogus (void **) casts. This unbreaks the -O2 build.

Fix kldxref on sparc64 by allowing non-trivial relocations to be performed
on variables read out of raw kld files. Unlike other platforms the value
will be in an Elf_Rela, not in the data section of the elf file.

Submitted by: Hartmut Brandt <brandt@fokus.gmd.de>
PR: 46730
Tested on: alpha (obrien), i386, sparc64

Usage style sweep: spell "usage" with a small 'u'.
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.

Remove unnecessary machine/bootinfo.h includes.

Submitted by: jake

WARNS=2 cleanup.

PR: bin/32567
MFC after: 2 weeks

Add kldxref(8), for maintaining the linker.hints file for translating
module->pathname.ko. It supports only ELF for now.

Submitted by: bp (with some minor tweaks)