Merge riastradh-drm2 to HEAD.

Use ${MACHINE_CPU} for m68k

branches: 1.49.2;
Make sure UUDECODE_FILES is empty if we do not have an old ld.so_aout
(on architectures that never used a.out)

There are other little endian arm machine_arches other than "arm"

branches: 1.47.6; 1.47.12;
remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

make MKPIC=no builds work on i368, shark, vax, pmax, sgimips, sparc,
maybe all mips and all arm as well.

branches: 1.45.38;
Convert to usage of UUDECODE_FILES and standardize on filename extension

Rework how MAKEVERBOSE operates:

* Don't bother prefixing commands with a line of ${_MKCMD}\
and instead rely upon "make -s". This is less intrusive on
all the Makefiles than the former. Idea from David Laight.

* Rename the variables use to print messages. The scheme now is:
_MKMSG_FOO Run _MKMSG 'foo'
_MKTARGET_FOO Run _MKMSG_FOO ${.TARGET}
From discussion with Alistair Crooks.

rework to use the newer _MKMSGCREATE (et al) macros

support MAKEVERBOSE

Rename a large chunk of the make(1) variables which refer to a
program/tool from "FOO" to "TOOL_FOO". The new variables are:
TOOL_ASN1_COMPILE TOOL_CAP_MKDB TOOL_CAT TOOL_CKSUM TOOL_COMPILE_ET
TOOL_CONFIG TOOL_CRUNCHGEN TOOL_CTAGS TOOL_DB TOOL_EQN TOOL_FGEN
TOOL_GENCAT TOOL_GROFF TOOL_HEXDUMP TOOL_INDXBIB TOOL_INSTALLBOOT
TOOL_INSTALL_INFO TOOL_M4 TOOL_MAKEFS TOOL_MAKEINFO TOOL_MAKEWHATIS
TOOL_MDSETIMAGE TOOL_MENUC TOOL_MKCSMAPPER TOOL_MKESDB
TOOL_MKLOCALE TOOL_MKMAGIC TOOL_MKTEMP TOOL_MSGC TOOL_MTREE
TOOL_PAX TOOL_PIC TOOL_PREPMKBOOTIMAGE TOOL_PWD_MKDB TOOL_REFER
TOOL_ROFF_ASCII TOOL_ROFF_DVI TOOL_ROFF_HTML TOOL_ROFF_PS
TOOL_ROFF_RAW TOOL_RPCGEN TOOL_SOELIM TOOL_SUNLABEL TOOL_TBL
TOOL_UUDECODE TOOL_VGRIND TOOL_ZIC

For each, provide default in <bsd.sys.mk> of the form:
TOOL_FOO?= foo
and for the ${USETOOLS}=="yes" case in <bsd.own.mk>, provide override:
TOOL_FOO= ${TOOLDIR}/bin/${_TOOL_PREFIX}foo

Document all of these in bsd.README.

This cleans up a chunk of potential (and actual) namespace collision
within our build infrastructure, as well as improves consistency in
the share/mk documentation and provision of appropriate defaults for
each of these variables.

MKDYNAMICROOT for a.out

Use ${NETBSDSRCDIR}/some/path instead of ${.CURDIR}/../../some/path

- in <bsd.files.mk>, don't clear FILES after using it, as that prevents
make -V FILES
from being useful (and given that every other variable can be
extracted using make -V, the behaviour was unusually inconsistent
given that the original reason for clearing it doesn't seem to be
relevant anymore)
- use <bsd.prog.mk> instead of directly including <bsd.files.mk>
(and possibly <bsd.man.mk> or <bsd.own.mk>)
- remove obsolete NOPROG

Add support for a VAX ld.so when VAX is ELF

Use ${PRINTOBJDIR}.

MACHINE_ARCH for ELF ARM platforms is "arm", not "arm32".

Make it possible for uudecode to be a host tool.

Add a uuencoded binary of a.out arm32 ld.so and update Makefile to extract
on ELF platforms.

This file was created using the following revisions:

ld.h,v 1.2 1998/12/17 23:36:38 pk
malloc.c,v 1.7 2000/11/28 06:01:34 mycroft
rtld.c,v 1.82 2001/09/20 20:55:29 wiz
shlib.c,v 1.18 2000/05/27 06:53:30 matt
shlib.h,v 1.1 1998/12/15 23:16:14 pk

arm32 specific files:

md-static-funcs.c,v 1.1 1997/10/17 21:25:42 mark
md.c,v 1.11 1999/02/27 03:34:05 tv
md.h,v 1.4 2000/05/28 01:53:05 matt
mdprologue.S,v 1.1 1997/10/17 21:25:59 mark

Rename rtld.1 to ld.aout_so.1, since it only describes ld.so for a.out.

Add a uuencoded binary of a.out m68k ld.so.
Created using following revisions in 1.5.1_BETA source tree:
ld.h,v 1.2 1998/12/17 23:36:38 pk
malloc.c,v 1.6.8.1 2001/04/06 09:39:23 he
rtld.c,v 1.76.4.2 2001/04/06 09:39:43 he
shlib.c,v 1.18 2000/05/27 06:53:30 matt
shlib.h,v 1.1 1998/12/15 23:16:14 pk
m68k specific files:
md-static-funcs.c,v 1.4 1998/01/05 22:00:38 cgd
md.c,v 1.16 1999/04/12 00:52:44 gwr
md.h,v 1.9 2000/05/28 01:53:09 matt
mdprologue.S,v 1.8 1998/01/05 22:00:40 cgd

- Add "dependall" target so that "make build" will really uudecode the
"ld.so" binaries for i386 and sparc.
- Remove bogus "${DESTDIR}/" from "FILESDIR".

Add uuencoded binaries for a.out dynamic loaders on i386 and sparc,
who are ELF now. Needed because cross-building them is still a
problem. These loaders will try /emul/aout first, but do not
have the baggage that COMPAT_AOUT has.

branches: 1.28.10;
Move the link.h files for the different shlib formats via repository copy,
and rename them to match the executable format. Introduce a new link.h
file which automatically picks the correct header based on the target of
the toolchain.

Build depending on OBJECT_FMT not a list of MACHINE_ARCH's

* Add header file containing definitions shared among all a.out
linker related utilities.
* Adjust makefile to new location in `src/libexec'
* Have rtld.c use the new shlib.h and ld.h headers.

Small changes to make debugging a little easier.

Remove bogus change to use -O0.

In case NOPICINSTALL is set, get -lc_pic from src/lib/libc/(objdirname).

use CPPFLAGS instead of CFLAGS

branches: 1.21.2;
Add the necessary -I flag to pick up the libc/include/extern.h

install all man pages.

Back out BUILDDIR and NOINSTALL changes.

branches: 1.18.2;
Remove an ifdef. Add comment about -nostdlib vs. ELF ld.

Use the extra LDFLAGS if OBJDIR is defined.

Ld directory reorganization:
- separate out the common files used by rtld ldd ld
- move machine dependent files into arch
- move ld in its own directory
- factor out .PATH and CFLAGS common to all Makefiles

Makefile cleanups

<link.h> has moved in with the run-time linker source.

Use DESTDIR to point at libraries like bsd.prog.mk does (PR#2524).

Add -fno-function-cse to PICFLAGS. Without it, Very Bad Things happen
when ld.so is compiled with gcc 2.7.2 on the m68k. From
Niklas Hallqvist <niklas@appli.se> in PR #1557. (Thanks, Nik, for reminding
me about this PR...)

New style RCS IDs.

Install the manual page.

Shrink ld.so by 12k.

Use somewhat customized version of malloc, in stead of relying on a
crummy sbrk() backend; proper aligment must be guaranteed on all archs.
Drafting dlopen, dlsym, et.al.

Minor cleanup.

Use MACHINE_ARCH.

Parcelled out the heap allocator into separate file.
Changes prototype for findshlib() (corrected library search order for ld).

MACHINE_ARCH support

Use strsep() in stead of strtok() and restore colons in eg. env. vars.

-Bshareable added to CFLAGS.

A linker supporting shared libraries (run-time part).

the Name for this manpage is "ld.aout_so". Use it.

Don't use .\" as callable macro.

branches: 1.8.8;
Convert TNF licenses to new 2 clause variant

branches: 1.7.30;
Add Ns where needed.

Remove superfluous Ns and quoting.

spell fixes (most from me, one from Igor Sobrado in PR misc/19700)

Begin new sentences on new lines.
Patch from Robert Elz (kre at munnari oz au).

Edit -mdoc usage.

* There is no -indent option to .Bd or .Bl, although you would
never know that from its frequent use in this tree. There is a
"-offset indent" combination that makes sense, and you can certainly
say "-width indent".

* Also, you can't markup the -width option argument, tho you CAN
use a callable macro. So "-width Ar filename" doesn't make sense,
but either "-width Ar" or "-width filename" does, as might something
like "-width xxfilename" for a little extra space.

* There are a lot of needlessly complex hanging tag macros in man4 used
to create simple item lists. Those should be simplified one of these
days before someone copies and edits yet another man4 page.

Drop some unnecessary .Pps.

Rename rtld.1 to ld.aout_so.1, since it only describes ld.so for a.out.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Remove clause 3 and 4 from TNF licenses

branches: 1.2.42;
Duh! Hang on to SUN_COMPAT.. something is bust.

* Add header file containing definitions shared among all a.out
linker related utilities.
* Adjust makefile to new location in `src/libexec'
* Have rtld.c use the new shlib.h and ld.h headers.

Rename to reflect the MACHINE_ARCH that will be used on ARM ELF
platforms.

Rename to reflect the MACHINE_ARCH that will be used on ARM ELF
platforms.

Add a uuencoded binary of a.out arm32 ld.so and update Makefile to extract
on ELF platforms.

This file was created using the following revisions:

ld.h,v 1.2 1998/12/17 23:36:38 pk
malloc.c,v 1.7 2000/11/28 06:01:34 mycroft
rtld.c,v 1.82 2001/09/20 20:55:29 wiz
shlib.c,v 1.18 2000/05/27 06:53:30 matt
shlib.h,v 1.1 1998/12/15 23:16:14 pk

arm32 specific files:

md-static-funcs.c,v 1.1 1997/10/17 21:25:42 mark
md.c,v 1.11 1999/02/27 03:34:05 tv
md.h,v 1.4 2000/05/28 01:53:05 matt
mdprologue.S,v 1.1 1997/10/17 21:25:59 mark

Newly built binaries from netbsd-1-4 sources, including fix for
PR#10940.

branches: 1.1.2;
Add uuencoded binaries for a.out dynamic loaders on i386 and sparc,
who are ELF now. Needed because cross-building them is still a
problem. These loaders will try /emul/aout first, but do not
have the baggage that COMPAT_AOUT has.

Add a uuencoded binary of a.out m68k ld.so.
Created using following revisions in 1.5.1_BETA source tree:
ld.h,v 1.2 1998/12/17 23:36:38 pk
malloc.c,v 1.6.8.1 2001/04/06 09:39:23 he
rtld.c,v 1.76.4.2 2001/04/06 09:39:43 he
shlib.c,v 1.18 2000/05/27 06:53:30 matt
shlib.h,v 1.1 1998/12/15 23:16:14 pk
m68k specific files:
md-static-funcs.c,v 1.4 1998/01/05 22:00:38 cgd
md.c,v 1.16 1999/04/12 00:52:44 gwr
md.h,v 1.9 2000/05/28 01:53:09 matt
mdprologue.S,v 1.8 1998/01/05 22:00:40 cgd

Newly built binary from netbsd-1-4 sources + arch/sparc/mdprologue.S, rev 1.8.
Workaround for non-executably mapped PLT in the data segment.

branches: 1.2.4;
Newly built binaries from netbsd-1-4 sources, including fix for
PR#10940.

branches: 1.1.2;
Add uuencoded binaries for a.out dynamic loaders on i386 and sparc,
who are ELF now. Needed because cross-building them is still a
problem. These loaders will try /emul/aout first, but do not
have the baggage that COMPAT_AOUT has.

netbsd.org->NetBSD.org

Add support for a VAX ld.so when VAX is ELF

Move the link.h files for the different shlib formats via repository copy,
and rename them to match the executable format. Introduce a new link.h
file which automatically picks the correct header based on the target of
the toolchain.

Pull in <a.out.h>.

Add AUX_LABEL (need for VAX JSB/JMP "jmp" slots).

Assign my copyrights to TNF.

Need <dlfcn.h> for Dl_info.

Add `dladdr()' rtld entry point.

Catch up with const changes to dlopen() and dlsym() prototypes in
<dlfcn.h>. Tested on i386 and hp300 for crt0.o and ld.so, verified
other references by inspection.

Define LD_HINTS_VERSION_2:
- no longer hash on minor version number in hints file.
- add list of ldconfig(8) search directories.

branches: 1.9.2;
Define `dlexit()' in crt<=>rtld interface (active in v4).

Put dlopen() et.al. declarations in separate header file for compatibility.

Revive library search paths.

Put a reserved field into use (weak symbol support).

new RCS ID format.

Enable dl*() prototypes.

Redone from scratch, but maintain SunOS compatibility.

Some definitions for the `ld.so.hints' file.

Moved <link.h> here from usr.bin/ld as it is needed by other modules
and utilities (eg. crt0, libc, nm).

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22284, verified by myself.

Make this compile with -DDEBUG.

branches: 1.6.8;
MAP_COPY -> MAP_PRIVATE

branches: 1.5.2;
Prototypes.

RCS id police.

NBPG --> getpagesize()

Conversion to err()/warn() for error reports.

Use somewhat customized version of malloc, in stead of relying on a
crummy sbrk() backend; proper aligment must be guaranteed on all archs.
Drafting dlopen, dlsym, et.al.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Remove duplicated include of <sys/types.h>
Fixes bin/25062.

RCS id police.

A linker supporting shared libraries (run-time part).

Rename rtld.1 to ld.aout_so.1, since it only describes ld.so for a.out.

This man page only documents behaviour on a.out. ld.aout_so uses
a colon separated LD_PRELOAD (in contrast to ld.elf_so), so undo last
commit.

LD_PRELOAD wants a space (not colon) separated list of libraries.
misc/11961 by Masao Uebayashi.

Document LD_PRELOAD, fixing PR lib/9663, and note that (and why) neither
this nor LD_LIBRARY_PATH are honored when executing set[ug]id.

Spelling

branches: 1.8.2; 1.8.6;
More and more .Os cleanups. .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages. Many more to
come.

Assign my copyrights to TNF.

Expand on shared object's `.init' functions a bit, and mention
`/usr/lib/c++rt.o'.

branches: 1.5.2;
Fix typos (PR#3761).

fix typo; from Saitoh Masanobu in PR misc/3696.
also comma-separate and reorder xrefs.

PR 3670 from SAITOH Masanobu <msaitoh@spa.is.uec.ac.jp>
Fix typos.

Allow customized trace output, so ldd(1) can be more conveniently used
as a filter.

Rearrange cascading stuff: remove two-level limit.

man page for the run-time linker

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Remove clause 3 and 4 from TNF licenses

branches: 1.87.30;
Fix problem where dlclose() falls into infinite loop.

Rename __LDPGSZ to AOUT_LDPGSZ, to accurately reflect what it is.

Remove extraneous \n's in {err,warn}{,x} that used to be printfs.

sweep of errx/warnx, remove unnecessary trailing \n

__STDC__ is always defined on NetBSD.

Use vsnprintf instead of vsprintf.
[XXX: not compiled, since I'm on ELF -- .uue should probably be rebuilt]

make sure we remove all the global references refering to a shared object
when we remove it. Similar to the fix I applied a while ago to ld.elf_so

Common symbol is not a member of particular shlib have particular shlib,
so avoid adding the base address of a shlib to the common symbol.
Fix PR #10940, hopefully.

Deal with an empty hints file.

Add another debugging message.

In dlopen(), use the main program's library search path, to match semantics of
other systems (and our ELF).

branches: 1.76.4;
Const poison dladdr().

MAP_COPY -> MAP_PRIVATE

Allow rpaths in setuid binaries, noticed by tron. This is already done
for ELF systems; make it uniform for a.out.

branches: 1.73.2;
Add ld.so hacks for arm32, and reenable ld.aout_so on arm32. As is well
known, XXX this needs a real fix.

Move the ldentry initialization up so that dl*() from init sections
works.

* Add header file containing definitions shared among all a.out
linker related utilities.
* Adjust makefile to new location in `src/libexec'
* Have rtld.c use the new shlib.h and ld.h headers.

Deal with compiler warnings: format strings, prototypes, variable initialization.

Make the BINDER debug messages a bit more useful (print index and jmpslot
address too).

Back out change to md_make_gotreloc which added 4 arguement of got_t *.
Add argument to md_fix_jmpslot indicating whether this the first (i.e
tranfer) jmpslot or not. Add better support for VAX (the VAX can support
pure text code; let ld that advantage of it). Checking in verified and
working versions of rtld VAX support routines.

Exit early from alloc_link_map() if we have no object; only relevant
when tracing. (PR#6140)

Assign my copyrights to TNF.

Small changes to make debugging a little easier.

When DEBUG, log init and fini calls.

Change ld.so default behavior to RTLD_LOCAL, and make RTLD_LOCAL into a
new flag bit. Keep RTLD_GLOBAL as an actual flag bit so it won't be
re-used, or may be used for something later. Mask the dlopen() mode bits
in ld.elf_so so a comparison against RTLD_NOW works. (RTLD_{LOCAL,GLOBAL}
needs to be implemented for ld.elf_so.)

branches: 1.62.2;
Clear the error indicator after retrieval (xref. dlerror(3)).

Optimize symbol/string table access slightly by precomputing their
locations at load time. These values don't change once the object is loaded.

Implement `dladdr()': find nearest symbol given an address.

Allow a non-RTLD_GLOBAL object to refer to symbols in itself.

Use file size from fstat(2) to map the hints file, instead of fiddling
with incremental mmap()'s. Squashes a bug which caused only the first
page of the hints file to unmapped.

Implement RTLD_GLOBAL dlopen(3) flag.
Rename internal flags to avoid <dlfcn.h> name space collisions.

Check for short hints file (noticed by Chuck Silvers).

Remove spurious extra newline.

Fill in missing (default) mmap(2) flags.

Print a warning message if we detect that a "copy symbol" has changed
size in a shared library. Also, always use our expected size to copy
the item in, on the assumption that doing so generally minimizes the
damage (maybe it's better to just bail out?).

RCS Id police

Do not free dlopen'ed map structures twice.
Plug memory leak when opening the same object mor than once.

Fix typo in free_link_map(); noticed by Mike Grupenhoff.

Patch from Chris Demetriou to unmap an object on last dlclose(), which
had not be implemented. It would cause an "adress space leak" and, if
the same object would opened multiple time, unwanted relocations.
Re: Comment from Chris:

"The a.out ld.so has some problems with dlclose. It doesn't properly
unmap objects which are dlclosed. That's a known problem (though a
serious one for programs which dlopen then dlclose lots of objects,
because it causes address space exhaustion), but it has a
previously-unknown side-effect.

If a single object is dlopened, then dlclosed, then dlopened _again_,
the relocations will be processed again. That causes obvious
problems."

Keep track of `dlsym()' symbol lookup scope differently. There's (currently)
only one special case: a NULL argument to dlopen(); return a special
token for that case.

Catch up with const changes to dlopen() and dlsym() prototypes in
<dlfcn.h>. Tested on i386 and hp300 for crt0.o and ld.so, verified
other references by inspection.

Deal with weak symbols when looking up in shared libraries.

Actually set the RTLD_DL flag in dlopen'ed shared objects, per PR#2791.

Iff __m68k__, use a `slight hack' to determine the magic of the executable
we're doing a dynamic link for, and change the page size used for offset
and size calculations if necessary. Allows the same ld.so to be used with
mixed m68k4k and m68k8k executables and libraries.

Thanks a million to Gordon Ross for the help in making this work!

Relax checking of minor version number in `findhint()'. Also use the
directories from the hints (v.2) file for directory traversing.
This should take care of PR#1146.

Deal with v.2 hint files (hint srch dirs not yet used).

Make dlopen() search for libraries if given a name of the form
`lib<name>.so[.xx[.yy]]' (per Erik M. Theisen; PR#1763; patch from PR
used in simplified form).

branches: 1.40.2;
Fix typo.

New style RCS IDs.

Allow customized trace output, so ldd(1) can be more conveniently used
as a filter.

Rearrange cascading stuff: remove two-level limit.

Interface version 4:
implement dlexit() (per Doug Rabson)
get actual rtld path from crt0
pass ld_entry back to crt0 in a better place

Check for zero sized BSS to avoid a big no-op syscall (per Mike Hibler).

Initialise after malloc (fixes PR#1149).
Also, correct comparison when looking in `prefered' paths.

#include <dlfcn.h>

Cache two more environment variable values.

Implement compiled-in library search paths: any `-L' argument encountered
while `dynamic link-mode' is on, is recorded in the executable. The
run-time linker will search these paths after $LD_LIBRARY_PATH but
before the default set and those currently in the hints file.
The feature is disabled whenever for set[ug]id programs.

Fix bogosities in cascade stuff.

Burn LD_RUN_PATH; I didn't read the SVR5 man-pages carefully enough.

Code from Matthew Green to do DL cascading "in the first degree".
Two `fprintf(stderr, ..)' => `warnx(..)'.

Bummer! Undo mmap() changes in rev. 1.26; they royally screw up the
kernel's pmap address preference mechanism.

Handle "/dev/zero" stuff more globally.

Re-arrange mmap() calls, per Charles' suggestion.

Ensure contiguous chunks for all of an object's address space (text+data+bss).

Don't close the hints file while it's mapped, but unmap and close it after
loading.

Re-add `LD_WARN_NON_PURE_CODE' that went missing.

Relax minor version number checking somewhat; issue warning if minor
version is less than expected.

branches: 1.21.2;
strdup() doesn't grok NULL pointers

Conversion to err()/warn() for error reports.

Another move to .data to please gdb.

Force some string constants into the data segment (for core-dump reading).
Rename internal dl_*() functions.
Do run-time symbol alias processing.

dlopen() should make a copy of argument (Thomas Eberhardt).

no more MAP_FILE

Libraries which are in the hints file but not in one's LD_LIBRARY_PATH (if
set) were not found.

Fix spelling error in Copyright notice

Use somewhat customized version of malloc, in stead of relying on a
crummy sbrk() backend; proper aligment must be guaranteed on all archs.
Drafting dlopen, dlsym, et.al.

Fill in gdb hook.

Hooks for for shared C++ objects with static contructors/destructors.

Parcelled out the heap allocator into separate file.
Changes prototype for findshlib() (corrected library search order for ld).

Do the debugger hooks.
Revised algorithm for finding symbols using `nz_other' (auxialiary type info).

Use strsep() in stead of strtok() and restore colons in eg. env. vars.

Print symbol name in "undefined" error msg.

This warning is fucking annoying, and ld already told us about it when we
linked the executable. Make it #ifdef DEBUG.

Search for top-of-stack blew up if program had no environment strings.

Support for `ld.so.hints'.
Handle set[ug]id programs.
No longer use the `lm_lob' field to access parent objects, add private
link map `parent' field in stead (SUN_COMPAT weirdness).

Renamed confusingly named macro.
Fixed bug that was the result of said confusion.

Define our copy of `errno', as it is no longer defined in libc.

A linker supporting shared libraries (run-time part).

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Add <sys/exec_aout.h> includes

Remove clause 3 and 4 from TNF licenses

branches: 1.21.16;
eliminate alloca for ssp.

sprinkle little const.

Another (unsigned char) cast - for ldconfig

Changes to put the COMPAT_AOUT code into ld.aout_so. Search <dir> for <lib>
then search /emul/aout/<dir> for <lib>. To make sure we don't get false
postives on ELF libraries we make the .so is a ZMAGIC dynamic library.

Use <link_aout.h> instead of <link.h>
for the benefit of building a.out (cross) ld on ELF platforms.
Suggested by Minoura Makoto.

branches: 1.16.2; 1.16.6;
Export the common shared library search functions in its own header file.

Prevent spurious matches matches against unwanted major versions.
Patch based on PR#6139.

Assign my copyrights to TNF.

If a good matching shared library is found, don't look in the next
directories. This is compatible with the SunOS behaviour. Also,
it fixes a problem where it was not possible for some 3rd party
package to have a library with the same name as a library already
in the system, and a lower version number. The highest version
would always be picked. This particular problem shows up with Mozilla,
which has a libutil.so.1.0

RCS Id police

Implement compiled-in library search paths: any `-L' argument encountered
while `dynamic link-mode' is on, is recorded in the executable. The
run-time linker will search these paths after $LD_LIBRARY_PATH but
before the default set and those currently in the hints file.
The feature is disabled whenever for set[ug]id programs.

Conversion to err()/warn() for error reports.
Minor bug fixes:
a case of free()ing in the wrong order. (from Rick Murphey).
processing alias symbol twice (sometimes).
Some miscellaneous cleanup.

Fix spelling error in Copyright notice

Use `.type' directives generated by gcc.
Numerous internal changes & bug fixes.
NOTE: must re-compile & re-link shared libraries before used to link programs.

Many internal changes, most notably in the symbol counting stuff.
`ld -r -x' now supported on all object files.
Support for long archive member names (AR_EFMT1 format),
thanks to Bill Sommerfeld/Mark Eichin
Do the right(?) thing with symbol aliases (N_INDR) for POSIX lover, especially
when equiping shared libraries with these (this was *not* fun).
Handle silly archives (.sa) for people who needs them; turn on by `-Bsilly'.

#include ctype.h, since we use isdigit().

Add /usr/X386/lib to the standard list of library paths.

Use strsep() in stead of strtok() and restore colons in eg. env. vars.

Changed prototype and internals of std_search_dir().

No rounding of bss size to page boundary in ZMAGIC a.out's, the kernel
chokes on it.
Some other minor changes.

A linker supporting shared libraries.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Remove clause 3 and 4 from TNF licenses

branches: 1.2.18;
sprinkle little const.

Export the common shared library search functions in its own header file.