Commit Graph

192 Commits

Author SHA1 Message Date
John Polstra
5ae2733874 Call do_ctors() and do_dtors() using indirect calls through function
pointers.  The calls are in different sections from the functions
being called, and they can potentially be far away.  On a very large
program, the 21-bit displacement field of the BSR instruction
overflowed at link time.
1999-06-06 15:59:08 +00:00
John Polstra
4e54ad63db Remove some left-over stuff from NetBSD that we don't need. This
eliminates the need to include the dynamic linker's private header
file, as well as two other headers from <sys>.
1999-04-24 02:07:17 +00:00
John Polstra
1306c069d2 Ugh. I didn't know this Makefile was reaching over into the dynamic
linker sources for some of its header files.  Add a -I flag to pick
up a new directory over there.
1999-04-09 05:56:23 +00:00
John Polstra
c30965b3bd Add "-fkeep-inline-functions" to CFLAGS so that higher optimization
levels (-O3 and above) won't remove essential code.  Many thanks
to Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru> for pointing out
that it was the optimizer's removal of this code that caused make
world with -O3 to break.  With this change, make buildworld now
completes.
1999-03-15 21:56:54 +00:00
John Polstra
0738f6e0c3 Reverse the order of processing object files within an executable or
shared library when invoking global constructors and destructors.
For constructors, the object files used to be processed from first
to last; now they're done from last to first.  (Destructors are done
in the opposite order, as required by the C++ standard.)  This makes
us consistent with standard gcc and egcs compilers.  It also
eliminates ordering differences between dynamic and static
executables.

Bump the value of __FreeBSD_version to 400002 to reflect this
change.
1999-03-13 01:35:44 +00:00
John Polstra
bb2b869188 Move the code for the ".init" and ".fini" sections outside of a
C function so the compiler won't try to emit line numbers for it
with "-g", breaking the build.  This has the nice side-effect of
making crtbegin.o and crtbeginS.o a little bit smaller.

Remove "-Wno-unused" from the Makefile.  Replace it with "__unused"
on particular function and variable declarations.
1999-03-12 17:33:28 +00:00
Hidetoshi Shimokawa
49837d6cd0 Initialize __progname by argv[0] before striping leading path,
otherwise we always get empty name.
1999-01-19 06:58:31 +00:00
John Polstra
f92bdbd010 Switch to using ".So" as the extension for PIC object files rather
than ".so".  The old extension conflicted with well-established
naming conventions for dynamically loadable modules.

The "clean" targets continue to remove ".so" files too, to deal with
old systems.
1999-01-09 21:51:00 +00:00
Steve Price
0997d762cf Strip the leading path from __progname.
Ok'd by:	jdp
1999-01-07 20:18:18 +00:00
Bruce Evans
3581d64b8d Fixed type mismatches in args to __syscall(). One for mmap() broke on
i386's with 64-bit longs -- the padding between mmap()'s 5th and 6th
is an int, not a long.  The other mismatches were benign.
1998-12-27 15:47:15 +00:00
Bruce Evans
d07b0a6163 Avoid using ld -O (as in bsd.lib.mk).
Fixed `make cleandepend'.  The default is null because SRCS is null.
1998-12-27 15:24:21 +00:00
Steve Price
a124f32704 Strip the leading path from __progname as is done in the a.out case. Also
bring in stddef.h so we can use NULL instead of 0 for pointer comparisons.

Hinted at by:	Bruce Evans
Reviewed by:	John Polstra
1998-12-24 18:19:47 +00:00
John Polstra
5584f22bb3 Make profiling work for ELF. gprof now autodetects the format of
the executable file, so it will work for both a.out and ELF format
files.  I have split the object format specific code into separate
source files.  It's cleaner than it was before, but it's still
pretty crufty.

Don't cheat on your make world for this update.  A lot of things
have to be rebuilt for it to work, including the compiler and all
of the profiled libraries.
1998-09-07 23:32:00 +00:00
John Birrell
34c91739be Remove the bootstrap hack that prevented the use of the rtld. 1998-08-20 21:37:22 +00:00
Bruce Evans
67b780b03b Fixed double slashes in pathnames. 1998-05-31 11:32:38 +00:00
Søren Schmidt
cabb97dcbf ELF preparation step 2:
Move a.out libraries to /usr/lib/aout to make space for ELF libs.
Make rtld usr /usr/lib/aout as default library path.
Make ldconfig reject /usr/lib as an a.out library path.
Fix various Makefiles for LIBDIR!=/usr/lib breakage.

This will after a make world & reboot give a system that no
longer uses /usr/lib/*, infact one could remove all the old
libraries there, they are not used anymore.

We are getting close to an ELF make world, but I'll let this
all settle for a week or two...
1998-05-26 20:12:56 +00:00
John Birrell
ec7fa2a51e Force BOOTSTRAP mode all the time while the headers are broken on alpha
as the result of i386 changes.
1998-05-04 02:06:09 +00:00
John Birrell
8999cfc9b5 Temporary fix for problems that occur if CFLAGS=-g is added to
/etc/make.conf. The tools can't handle generating debug code where
we fiddle with the ELF segments.
1998-04-01 03:24:19 +00:00
John Birrell
f672a042cf Don't share sources with i386-elf. That was too difficult. 8-(
Add a bootstrap mode so that non-rtld versions of these objects can
be built when bootstrapping the system with NetBSD tools, headers
and libraries. Once the FreeBSD tools are built, the FreeBSD headers
are installed and *then* these objects can be recompiled with the
rtld references. Phew.
1998-03-11 20:41:55 +00:00
John Birrell
1901906aa6 Sharing the crt sources with i386-elf wasn't too successful. The crti
asm code didn't link the way it was supposed to and the calling convention
for the entry "function" turned out to be very different. On alpha
it's a true function, but on i386 it's a fudge. Blech.

So jdp suggested keeping separate sets of source and avoiding lots
of #ifdefs. These files are based on his i386-elf code, with crt1.c
borrowing code from NetBSD's crt0. The copyright reflects that.

Complicating matters, the code turned out to be difficult to bootstrap
build using NetBSD tools. To compile against the FreeBSD rtld header
requires FreeBSD specific headers, but these can't be installed until
the tools are built, and they can't be built without the FreeBSD crt
objects. Anal retentive. So I introduced a HAVE_RTLD #define that isn't
set during the build process until all the tools are built and the
headers installed.
1998-03-11 20:36:11 +00:00
John Birrell
b843e53a97 Trash startup sources from NetBSD in favour of jdp's FreeBSD source
now that has been committed.

The makefile is derived from the i386-elf version, modified to pick
up most of the source (except crt1.c) from i386-elf. With minor changes
to i386-elf/crt1.c, this directory can be combined with i386-elf to
be a single csu/elf directory for all seasons.
1998-03-10 07:04:18 +00:00
John Birrell
fbb2bc058d Import a sanitized version of jdp's crt1.c from i386-elf. I have removed
the rtld code pending implementation on the alpha.

The csu/i386-elf should be renamed as csu/elf and this directory
trashed. Consider this a temporary implementation.
1998-03-10 06:56:16 +00:00
John Polstra
966a88d986 Import C startup files for ELF support.
Submitted by:	John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
John Polstra
0fbd9e9828 Remove the include of <dlfcn.h> from crt0.c; it is not needed now
that the dl* trampolines have been moved into libc.

Move dlfcn.h from src/lib/csu/i386 into src/include.  Nothing in
src/lib/csu/i386 uses it any more.
1998-02-11 04:57:25 +00:00
John Polstra
645c4be38a Move the trampolines for dlopen and related functions from crt0.o
into libc.  This reduces the size of every dynamically linked
executable by 248 bytes, and it reduces the size of static executables
by a lesser amount.  It also eliminates some global namespace
pollution.

With this change in place, the source for dlfcn.h should probably
be moved to "/usr/src/include".  I'll save that for another day.

Compatibility note:  Programs which use dlopen, if compiled on
systems with this change, will not run on systems with a libc from
prior to this change.  Very few programs use dlopen, so I think
that is OK.
1998-02-09 06:05:25 +00:00
John Polstra
663690b388 Implement dladdr. 1998-02-06 16:46:46 +00:00
Eivind Eklund
920207a8e9 ${TARGET} -> ${.TARGET}
Tiny pointed hat goes to:	Our Makefile-meister.
1998-01-12 18:29:02 +00:00
John Birrell
3c526fbfd3 CSU source for Alpha obtained from NetBSD. The makefile will require
more work when we get a half-way usable libc (which is next).
1998-01-11 03:30:39 +00:00
Brian Somers
9822c98d98 const correctness for dl*() 1997-11-22 03:34:46 +00:00
Satoshi Asami
fc702c5bc8 Make this file p-make clean. (Use "ld -O foo" instead of "ld; mv
a.out foo".)

Reviewed by:	bde (actually more like "Suggested by")
1997-10-11 02:37:42 +00:00
Wolfram Schneider
bf5cbf3551 Sort cross refereces in section SEE ALSO. 1997-09-29 19:11:55 +00:00
John Polstra
7e7344e2f4 Implement dlsym(RTLD_NEXT, symbol). 1997-08-02 04:56:44 +00:00
Mike Smith
dff682856f Use our copy of dlfcn.h, not the version in /usr/include, which may not
be up-to-date when we are building.
Submitted by:	Terry Lambert <terry@lambert.org>
1997-04-30 03:12:09 +00:00
John Polstra
f3112eb32a Declare the constructor/destructor linker sets as extern rather than
common.  Add one do-nothing element to each set.  This ensures that
the linker realizes that they are linker sets rather than simple
commons, and makes it possible to link c++rt0.o into every shared
library regardless of whether it is a C++ library or not.  Without
this change, the constructors and destructors in the main program
could be executed multiple times.

This change is going to make it possible to get rid of the
CPLUSPLUSLIB makefile variable once and for all.  It is a piece of
the solution to PR gnu/3505 (gcc -shared).  Finally, it fixes a
heretofore unreported bug:  If CPLUSPLUSLIB was set in a makefile
for a C++ shared library that had no static constructors or
destructors in it, then the main program's constructors and
destructors would be executed multiple times.
1997-04-09 19:14:31 +00:00
John Polstra
bb789b9ea2 Fix an error in the previous revision that caused make world breakage. 1997-04-02 16:49:18 +00:00
Bruce Evans
67fd3b9895 Simplified install rule. 1997-04-01 13:53:16 +00:00
Peter Wemm
7e546392b5 Revert $FreeBSD$ to $Id$ 1997-02-22 15:12:41 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
John Polstra
f08cd1247b Convert to mdoc format.
Add descriptions of RTLD_LAZY and RTLD_NOW.
Correct the synopsis to agree with the actual function prototypes.
Add clarifications of a few things.
Clean up the wording in a few places.
1997-01-12 19:55:49 +00:00
John Polstra
8a8c5a99ee Add definitions of RTLD_LAZY and RTLD_NOW. 1997-01-12 18:37:46 +00:00
John Polstra
65eabc3424 Set the "crt_ldso" member of the crt-to-ld.so interface structure. This
was apparently overlooked at the time the member was added.  Its absence
causes some error messages from the dynamic linker to begin with
"(null):" instead of with the pathname of the dynamic linker as they
should.

I am also adding a work-around to the dynamic linker, to cope with
legacy binaries that were built with older versions of crt0.
1997-01-11 23:59:34 +00:00
Bruce Evans
fd0a86436e Use ${COPY} instead of -C for installing non-source files. crt*.o
should be installed using the same flag as libraries, but ${COPY}
is currently used for libraries.
1997-01-01 04:52:55 +00:00
Peter Wemm
fbde87863d When linking with no rtld support, provide stub dl*() functions that
just return errors.  This removes the need for awful hacks like that in
our build of libtcl which would get link errors when linked static.

John Polstra once mentioned that this was on his "todo" list.

Note that one can use:
  cc -Wl,-Bstatic -o foo foo.o
and get an executable that has it's libraries statically linked, but has
a fully functional runtime linker so the executable can call dlopen() and
have it work.  (I've tested this)
1996-12-28 17:10:52 +00:00
Marc G. Fournier
d453b6a53d Fixed prototyping of dlopen/dlsym in dlfcn.h, to match how crt0.c defines
it and link.h prototypes it

Error of my ways pointed out by Peter
1996-10-08 01:41:51 +00:00
Steve Price
3d78e32756 Remove garbage initcode reference so that 'gcc -Dlint ...'
will compile without error.
1996-10-06 03:19:26 +00:00
Peter Wemm
4e89f352f0 Support crt0 <-> ld.so interface version 4. This should be both backwards
and forwards compatable with version 3.  This is needed to enable storing
a run-time library path in the dynamic linking headers.  The crt startup
tries version 4 first, and falls back to version 3, so an executable that
is linked on -current will work with the ld.so on 2.1.x and less.

Reviewed by: nate, jdp
Obtained from: NetBSD
1996-10-01 00:54:48 +00:00
Peter Wemm
dce96329a9 cmp -s || install -c --> install -C 1996-08-30 01:41:52 +00:00
Wolfram Schneider
9fb933075e `mv'' -> `mv -f''
``rm'' -> ``rm -f''
so mv/rm may not ask for confirmation if you are not root
1996-05-07 23:19:49 +00:00
John Polstra
89370a31f2 Changed the dimensions of __CTOR_LIST__ and __DTOR_LIST__ from 0
to 2.  This makes them agree with the declarations in libgcc, and
clears the way once again for linking c++rt0.o into all libraries,
and eliminating CPLUSPLUSLIB from <bsd.lib.mk>.  (I have not made
that change yet, because there is still a bootstrapping problem
for "make world".)

Also, removed a check which ensured that the constructor count in
the first word of __CTOR_LIST__ was greater than zero before
traversing the list.  I had added that check earlier, but it is no
longer necessary, now that there is guaranteed to be at least 2
words in __CTOR_LIST__.
1996-02-20 04:07:26 +00:00
Nate Williams
98c4ae7b2b Back out the thread_init code in order to allow -current to bootstrap
from -stable, until a better solution is found.

Submitted by:	Consensus of mailing list and the almighty Jordan :)
1996-01-30 05:55:20 +00:00
Julian Elischer
f70177e76e Reviewed by: julian and (hsu?)
Submitted by:	 John Birrel(L?)

changes for threadsafe operations
1996-01-22 00:02:33 +00:00
John Polstra
d5489b0d8f Check the count in the first word of __CTOR_LIST__ before executing
the loop that invokes the static constructors.  That makes it safe
to link c++rt0.o into any shared library, even one that does not
have any static constructors.  Formerly, doing that would cause a
bus error.  If the library has no static constructors, __CTOR_LIST__
comes out as a simple 4-byte COMMON region, and it does not have
the usual NULL word that terminates the list of constructors.  This
caused the old code to "call" a garbage address via the non-existent
entry __CTOR_LIST__[1].

The analogous code that invokes the static destructors was already safe.

This change is fully backward-compatible.

Reviewed by:	dfr@render.com (Doug Rabson)
1996-01-15 17:53:25 +00:00
Peter Wemm
6065a0be11 This commit was generated by cvs2svn to compensate for changes in r13122,
which included commits to RCS files with non-trunk default branches.
1995-12-30 19:02:48 +00:00
Peter Wemm
a5b996a7ec recording cvs-1.6 file death 1995-12-30 19:02:48 +00:00
Andrey A. Chernov
3e912c9dee Remove my locale hack. Sigh. 1995-11-02 12:42:42 +00:00
Poul-Henning Kamp
05fc2de514 Clean up and make code (more) readable. 1995-10-29 09:49:21 +00:00
Bruce Evans
ccbc94648a Fixed dependencies for scrt0.o.
Build a static gcrt0.o (sgcrt0.o) too.  Currently only the dynamic gcrt0.o
is used, although -pg forces -static.
Sorted the .o targets.
1995-10-22 18:36:47 +00:00
Poul-Henning Kamp
6b44b1a3fa -fomit-frame-pointer is becomming an increasingly popular optimization,
so before somebody screws up royally, make sure this always works by
adding a -fno-omit-frame-pointer here.
1995-10-20 20:05:15 +00:00
Poul-Henning Kamp
ee61b5a715 put the _getenv and _strncmp under #ifdef DEBUG, which is the only time
they are used.  Saves a few bytes here and there, nothing major.
1995-10-18 15:56:55 +00:00
David Greenman
14c175f7a9 Create a scrt0.o file that specifically excludes the shared-lib support.
This will be used for -static programs.
1995-10-18 04:19:00 +00:00
Nate Williams
4d2131fbc9 Fixup the "ld.so failed" message for the case when ld.so finds undefined
symbols.

An easy example to see this is to develop an X program which links
against Xt, but doesn't add -lX11 to the link line.  It will link fine,
but cause run-time errors by ld.so because of missing symbols used by Xt
defined in X11.  This patch makes the errors more readable.

Submitted by:	jdp@polstra.com (John Polstra)
1995-09-27 23:13:33 +00:00
Bruce Evans
97cefc5891 Install source files with the -c flag, not with the optional flag ${COPY}. 1995-08-06 12:37:41 +00:00
Bruce Evans
48cfb668fc Change install' to ${INSTALL}' so that default install flags can be
specified in the top level Makefiles.

Previously I missed dozens of Makefiles that skip the install after
using `cmp -s' to decide that the install isn't necessary.
1995-08-06 12:24:38 +00:00
Garrett Wollman
4fa53f8ca6 Numerous Makefile fixes:
1) Do dependencies.
2) Install all appropriate links to manual pages.
3) Install header file in `beforeinstall' like all the rest.
4) Install header file only if changed.
5) Install object files only if changed.
1995-06-30 15:30:35 +00:00
Doug Rabson
82aaeb09ad Change ld.so to correctly load dependant libraries for dlopen and unload them
on dlclose.  Also correctly call constructors and destructors for libraries
linked with /usr/lib/c++rt0.o.
Change interpretation of dlopen manpage to call _init() rather than init()
for dlopened objects.
Change c++rt0.o to avoid using atexit to call destructors, allowing dlclose to
call destructors when an object is unloaded.
Change interface between crt0 and ld.so to allow crt0 to call a function on
exit to call destructors for shared libraries explicitly.

These changes are backwards compatible.  Old binaries will work with the new
ld.so and new binaries will work with the old ld.so.  A version number has
been introduced in the crt0-ld.so interface to allow for future changes.

Reviewed by:	GAWollman, Craig Struble <cstruble@singularity.bevc.blacksburg.va.us>
1995-06-27 09:53:27 +00:00
Rodney W. Grimes
6c06b4e2aa Remove trailing whitespace. 1995-05-30 05:51:47 +00:00
Poul-Henning Kamp
139762f2be Install the dlopen.3 manpage. 1995-03-30 06:40:31 +00:00
Poul-Henning Kamp
e9434bccf7 Remove an unused variable. 1995-02-24 07:51:13 +00:00
Jordan K. Hubbard
f2c81e4dd7 Install the header files. 1995-02-09 08:00:20 +00:00
Jordan K. Hubbard
2a947a4bbf Add two parts of Mark's/Gary's dlopen() changes that I missed before. 1995-02-08 17:56:27 +00:00
Jordan K. Hubbard
38f4fb1525 Support for more Sun compatible dlopen() and friends. Also added proper error
handling.
Reviewed by:    gj
Submitted by:   Mark Diekhans <markd@grizzly.com>
1995-02-07 13:27:29 +00:00
Andrey A. Chernov
662bfb6660 Call reduced (8-bit only) startup_setlocale() 1994-09-24 16:01:30 +00:00
Andrey A. Chernov
54335ac349 Change level of setlocale hack enabling from compile option STARTUP_LOCALE
to check (via getenv) environment variable "ENABLE_STARTUP_LOCALE" at
runtime.
Submitted by: me per Bruce suggestion
1994-09-19 02:00:21 +00:00
Andrey A. Chernov
f32a347542 Add (#ifdef'ed by STARTUP_LOCALE) following line to crt0.c
(void) setlocale(LC_ALL, "");

It will be easiest way now to make national chars available
for all ctype-oriented programs at once by simple:

setenv LANG Your_National_Charset

Default case (without "LANG" environment
variable) will be fully ANSI compatible (got "C" locale).

If "LANG" variable present, extention becomes active.

Effect of this extention is great: in one time all ctype
oriented programs can accept/print national characters
without any touching source/binary code, it is big win, IMHO.

This method is fully compatible with ISO8859-* and russian koi8-r
too (in general -- with all 8-bit character sets). I think
it is very useful.
I got this idea from Xenix locale implementation.

This extention is even never compiled in, unless you set
	setenv STARTUP_LOCALE
before rebuilding crt0.c or corresponding variable in /etc/make.conf
1994-09-18 22:21:04 +00:00
Bruce Evans
459e429cab Remove dead code. gmon stuff is now done better in libc/gmon an
<machine/profile.h>.  The old version was writing an incomplete
header without the profrate field that is necessary to handle the
current faster profiling clock.  The counters that are where the
the profrate should be are usually 0 and gprof converts a profrate
of 0 to hz so the old version gave times too large by a factor of
profhz/hz = 10.24.
1994-08-22 15:13:41 +00:00
Garrett Wollman
b4162996d5 Make it work with new mmap syscall. 1994-08-05 17:53:07 +00:00
Rodney W. Grimes
f46145aa78 MAP_FILE is the default on mmap now, and is no longer defined just
like on a sun, so #define it to be 0 if we are running BSD >=199306.
1994-05-28 13:59:16 +00:00
Nate Williams
f2523a7e72 From Jordan via. Paul K.
This fixes the problems Warner's having with ctors not being called
again with the latest round of ld changes and updates the file-names to what
Paul is using now.

The name change will not affect anything as we are not (yet) using it.
1994-03-09 17:12:59 +00:00
Nate Williams
17682d0199 Allow NetBSD (old style) shared binaries to work. Probably not the
final solution but at least this gets folks running -current up again.
1994-02-16 19:26:39 +00:00
Jordan K. Hubbard
14a24404ef New dlopen, dlclose, etc al. For the new ld changes. 1994-02-13 20:53:11 +00:00
David Greenman
1799d2585e Implemented 'QMAGIC' a.out format correctly, and changed the default
output to be QMAGIC.
1994-01-03 18:35:54 +00:00
Jordan K. Hubbard
4344c041d1 Adding embryonic C++ shared lib support (all tests positive so far). 1993-12-24 02:11:37 +00:00
Andrey A. Chernov
fe596e6795 -r option incorrectly removed:
it is impossible to make gcrt0.o from moncrt0.o and gmon.o without it.
1993-11-18 00:08:03 +00:00
Paul Richards
b2c0440d02 Removed all the ld -x -r stuff -- paranoia. 1993-11-16 02:22:16 +00:00
Paul Richards
bfa077712f shlib update:
Can get rid of local symbols with "ld -x -r" again.
Made LDSO #ifdef DEBUG.
1993-11-09 04:26:11 +00:00
Paul Richards
423a102938 Removed install -d line since our install doesn't support the -d
option.
1993-11-07 03:05:40 +00:00
Paul Richards
44d76bb777 Added shared libs support from NetBSD. 1993-11-04 01:09:18 +00:00
David Greenman
cd11d97905 Yanked out the 8 'addb %al,%al' (0xc000)'s out of the start of the
program. The idea was that these are 'alignment' crap, but the image
is 16byte-aligned without these. Location 0 still doesn't have a 0,
but who cares, binaries wil be built with page zero unmapped in the
near future.
1993-10-26 09:04:13 +00:00
Charlie Root
dcd59e0868 Added ${COPY} knob to the install commands 1993-07-03 00:21:21 +00:00
Nate Williams
25a0fedd25 Added some support the new err(3) routines need
(Copied directly from NetBSD verbatim)
1993-06-29 04:34:12 +00:00
Paul Richards
52768b912b Upgrade to GCC 2.X 1993-06-18 02:04:48 +00:00
Rodney W. Grimes
5b81b6b301 Initial import, 0.1 + pk 0.2.4-B1 1993-06-12 14:58:17 +00:00