Commit Graph

1967 Commits

Author SHA1 Message Date
Ed Maste
244f6b3ec3 Remove historical GNUC test
The requirement is for a GCC-compatible compiler and not necessarily
GCC itself. However, we currently expect any compiler used for building
the whole of FreeBSD to be GCC-compatible and many things will break if
not; there's no longer a need to have an explicit test for this in rtld.

Reviewed by:	imp, kib
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D2422
2015-05-06 15:29:11 +00:00
Mariusz Zaborski
256b83ab83 Remove the use of nvlist_.*[vf] functions from casper and replace
them with snprintf(3). Assert the results of snprintf(3).

Approved by:	pjd (mentor)
2015-04-29 22:33:53 +00:00
Konstantin Belousov
8f96f18a1b Remove the #ifdef DEBUG code, which is not compilable on 64bit
architectures.  It seems to be an overlooked chunk in the r15645.

PR:	199767
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-04-29 19:47:18 +00:00
Konstantin Belousov
b3ff02bf85 Change interpretation of the DF_ORIGIN and DF_1_ORIGIN flags.
According to standard, the presence of the flags only means that the
object path must be resolved at the time object loading, instead of my
reading that the flag is required to enable token substitution at all.

The consequence is that -z origin linker flag is no longer required
for the token substitution in the run/rpath or the needed library
soname.  It is only recommended if token substition is needed at
dlopen(3) time, since namecache might drop the required entries at the
time of resolution.

Found, reviewed and tested by:	emaste
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-04-27 18:41:31 +00:00
Mariusz Zaborski
8133297684 Fix potential memory leak.
Pointed-out by:	pfg
Approved by:	pjd (mentor)
2015-04-27 17:33:00 +00:00
Craig Rodrigues
d5fec48956 Support file verification in MAC.
* Add VCREAT flag to indicate when a new file is being created
* Add VVERIFY to indicate verification is required
* Both VCREAT and VVERIFY are only passed on the MAC method vnode_check_open
  and are removed from the accmode after
* Add O_VERIFY flag to rtld open of objects
* Add 'v' flag to __sflags to set O_VERIFY flag.

Submitted by:		Steve Kiernan <stevek@juniper.net>
Obtained from:		Juniper Networks, Inc.
GitHub Pull Request:	https://github.com/freebsd/freebsd/pull/27
Relnotes:		yes
2015-04-22 01:54:25 +00:00
Andrew Turner
899b27a318 Use the correct value to get the offset of the objects tls data.
Sponsored by:	The FreeBSD Foundation
2015-04-15 14:20:12 +00:00
Konstantin Belousov
3de3815469 Implement support -z global linker option. It marks the shared object
as always participating in the global symbols namespace, regardless of
the way the object was brought into the process address space.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-04-15 08:16:34 +00:00
Ed Maste
ba29f2ddfb MIPS rtld: report missing symbol rather than segfaulting
This is only an interim fix; MIPS should be using the MI code instead,
which does not have this issue.

Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D661
2015-04-05 14:06:11 +00:00
Andrew Turner
a97120d61e Add support for thread local storage on arm64 to the runtime linker. The
ABI specifies that, for R_AARCH64_TLSDESC relocations, we use the symbol
value, addend, and object tls offset to calculate the offset from the tls
base. We then cache this value for future reference.

Differential Revision:	https://reviews.freebsd.org/D2183
Reviewed by:	kib
Sponsored by:	The FreeBSD Foundation
2015-04-03 09:35:52 +00:00
Ed Maste
29f36d0bf8 Make die available as rtld_die for use by MD relocation code
Reviewed by:	kib
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D2213
2015-04-02 21:35:36 +00:00
Ed Maste
f5f299c30b Correct copyright typo 2015-03-31 12:53:07 +00:00
Andrew Turner
047c6e3ae6 Add the arm64 code to the runtime linker. It's not able to be built as we
still need libc_pic for a few things, but this is expected to be ready
soon.

Differential Revision:	https://reviews.freebsd.org/D2136
Reviewed by:	kib
Sponsored by:	The FreeBSD Foundation
2015-03-31 09:51:19 +00:00
Konstantin Belousov
0c4f9ecde3 Change compiler setting to make default visibility of the symbols for
rtld on x86 to be hidden.  This is a micro-optimization, which allows
intrinsic references inside rtld to be handled without indirection
through PLT.  The visibility of rtld symbols for other objects in the
symbol namespace is controlled by a version script.

Reviewed by:	kan, jilles
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-03-29 18:53:21 +00:00
Jung-uk Kim
0461326c01 When a file is executed and the path starts with `/', AT_EXECPATH is set
without any translation.  If the file is a symbolic link, $ORIGIN may not be
expanded to the actual origin.  Use realpath(3) to properly expand $ORIGIN
to its absolute path.

Reviewed by:	kib
MFC after:	1 week
2015-02-27 19:05:23 +00:00
Enji Cooper
11981695fc Add the following options to enable/disable several features in the base system
WITHOUT_BOOTPARAMD - bootparamd
WITHOUT_BOOTPD - bootpd
WITHOUT_FINGER - finger, fingerd
WITHOUT_FTP - ftp, ftpd
WITHOUT_INETD - inetd
WITHOUT_RBOOTD - rbootd
WITHOUT_TCP_WRAPPERS - tcpd, et al
WITHOUT_TFTP - tftp, tftp-server
WITHOUT_TIMED - timed

MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division
2015-02-04 10:19:32 +00:00
Konstantin Belousov
803fc2ca26 Use powerof2(). Remove single-use variable.
Submitted by:	Conrad Meyer
Differential Revision:	https://reviews.freebsd.org/D1724
MFC after:	1 week
2015-01-30 15:32:35 +00:00
Dag-Erling Smørgrav
4ac1e0a9fc Allow tracing dlfunc() / dlsym() events.
MFC after:	1 week
2015-01-25 12:11:50 +00:00
Enji Cooper
3f802165ba Add MK_TALK knob for building the talk and talkd
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division
2015-01-25 04:37:44 +00:00
Justin Hibbits
8c29a9824b Apply r246556 to powerpc:
Avoid use of register variables, which some compilers (e.g. clang)
don't like. It makes the code a little clearer as well.

This allows a clang 3.5 built powerpc world to run (tested in a jail).

MFC after:	1 week
2015-01-06 03:49:22 +00:00
Konstantin Belousov
0c5cba543b Do not erronously export 'openat' symbol from rtld.
The symbol leaked after r276630 since lib/libc/sys/openat.c defines
versions for openat using .symver (version script cannot assign two
versions to one symbol), and rtld uses openat.  Instead, directly use
__sys_openat().

Reported and tested by:	antoine
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-01-04 00:33:41 +00:00
Konstantin Belousov
0e521992a4 Add rtld private interface for dso to detect dynamic loading
vs. static linking.

Tested by:	pho, antoine (exp-run)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-01-03 18:09:53 +00:00
Dimitry Andric
918428b837 Fix the following -Werror warning from clang 3.5.0, while building
rtld-elf for powerpc 32 bit:

libexec/rtld-elf/powerpc/reloc.c:486:6: error: taking the absolute value of unsigned type 'Elf_Addr' (aka 'unsigned int') has no effect [-Werror,-Wabsolute-value]
        if (abs(offset) < 32*1024*1024) {     /* inside 32MB? */
            ^
libexec/rtld-elf/powerpc/reloc.c:486:6: note: remove the call to 'abs' since unsigned values cannot be negative
        if (abs(offset) < 32*1024*1024) {     /* inside 32MB? */
            ^~~
1 error generated.

Cast 'offset' to int, since that was intended, and should be safe to do
on architectures with 32-bit two's complement ints.

Reviewed by:	kib
Differential Revision: https://reviews.freebsd.org/D1387
2014-12-28 19:55:44 +00:00
John Baldwin
9abeb029d4 The runtime linker needs to include a path to itself in the link map
it exports to the debugger.  It currently has two choices: it can use
a compiled-in path (/libexec/ld-elf.so.1) or it can use the path stored
in the interpreter path in the binary being executed.  The runtime linker
currently prefers the second.  However, this is usually wrong for compat32
binaries since the binary specifies the path of rtld on a 32-bit system
(/libexec/ld-elf.so.1) instead of the actual path (/libexec/ld-elf32.so.1).
For now, always assume the compiled in path (/libexec/ld-elf32.so.1) as
the rtld path and ignore the path in the binary for the 32-bit runtime
linker.

Differential Revision:	https://reviews.freebsd.org/D1236
Reviewed by:	kib
2014-12-02 16:22:08 +00:00
Baptiste Daroussin
ee5a34ecba Convert to LIBADD
Reduce overlinking
2014-11-25 21:18:18 +00:00
Ed Maste
294246bb7d Revert r274772: it is not valid on MIPS
Reported by:	sbruno
2014-11-25 03:50:31 +00:00
Ed Maste
688fd61ae8 Use canonical __PIC__ flag
It is automatically set when -fPIC is passed to the compiler.

Reviewed by:	dim, kib
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D1179
2014-11-21 02:05:48 +00:00
John-Mark Gurney
d5fb42c2ca I agree w/ tedu that this isn't a Bug.. it's like complaining that
you can't use an ssh client to fetch a web page...

Submitted by:	tedu (via -tech)
2014-11-20 04:15:58 +00:00
Enji Cooper
ad11def521 Add baud rate support to telnet(1)
This implements part of RFC-2217

It's based off a patch originally written by Sujal Patel at Isilon, and
contributions from other Isilon employees.

PR: 173728
Phabric: D995
Reviewed by: markj, markm
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division
2014-11-11 04:06:05 +00:00
Julio Merino
0677dfd1c4 MFV: Import atf-0.21. 2014-11-01 11:17:54 +00:00
Mark Murray
10cb24248a This is the much-discussed major upgrade to the random(4) device, known to you all as /dev/random.
This code has had an extensive rewrite and a good series of reviews, both by the author and other parties. This means a lot of code has been simplified. Pluggable structures for high-rate entropy generators are available, and it is most definitely not the case that /dev/random can be driven by only a hardware souce any more. This has been designed out of the device. Hardware sources are stirred into the CSPRNG (Yarrow, Fortuna) like any other entropy source. Pluggable modules may be written by third parties for additional sources.

The harvesting structures and consequently the locking have been simplified. Entropy harvesting is done in a more general way (the documentation for this will follow). There is some GREAT entropy to be had in the UMA allocator, but it is disabled for now as messing with that is likely to annoy many people.

The venerable (but effective) Yarrow algorithm, which is no longer supported by its authors now has an alternative, Fortuna. For now, Yarrow is retained as the default algorithm, but this may be changed using a kernel option. It is intended to make Fortuna the default algorithm for 11.0. Interested parties are encouraged to read ISBN 978-0-470-47424-2 "Cryptography Engineering" By Ferguson, Schneier and Kohno for Fortuna's gory details. Heck, read it anyway.

Many thanks to Arthur Mesh who did early grunt work, and who got caught in the crossfire rather more than he deserved to.

My thanks also to folks who helped me thresh this out on whiteboards and in the odd "Hallway track", or otherwise.

My Nomex pants are on. Let the feedback commence!

Reviewed by:	trasz,des(partial),imp(partial?),rwatson(partial?)
Approved by:	so(des)
2014-10-30 21:21:53 +00:00
Warner Losh
46fbe6c8ed Add an "empty" Makefile.pc98 because it doesn't need/want HYPERV. It
is not relevant to the hardware it runs on.
2014-10-16 14:08:59 +00:00
Warner Losh
f8080a9986 HYPERV isn't available on all architectures, but just on by default
for i386/amd64. Rather, it only works on i386/amd64 and should only be
built there. Rather than change the default based on which
architecutre, do things more directly by only building it on
i386/amd64 and having it always on. This is how we handle other
options that are relevant only for a few architectures.
2014-10-16 00:33:06 +00:00
Ed Maste
54ac10780f Always return pathname in dl_iterate_phdr's dlpi_name, as Linux does
Linux LD_ITERATE_PHDR(3):
    The dlpi_name field is a null-terminated string giving the
    pathname from which the shared object was loaded.

That functionality is much more useful than returning just the short
name.

Approved by:	kan
Sponsored by:	The FreeBSD Foundation
2014-10-09 20:39:18 +00:00
Andrew Turner
6d4766c1b8 Remove MK_ARM_EABI, the armeb issues have been fixed. The code to support
the oabi is still in the tree, but it is expected this will be removed
as developers work on surrounding code.

With this commit the ARM EABI is the only supported supported ABI by
FreeBSD on ARMa 32-bit processors.

X-MFC after:	never
Relnotes:	yes
Differential Revision: https://reviews.freebsd.org/D876
2014-10-01 08:26:51 +00:00
Xin LI
e72055b7fe Import HyperV Key-Value Pair (KVP) driver and daemon code by Microsoft,
many thanks for their continued support of FreeBSD.

While I'm there, also implement a new build knob, WITHOUT_HYPERV to
disable building and installing of the HyperV utilities when necessary.

The HyperV utilities are only built for i386 and amd64 targets.

This is a stable/10 candidate for inclusion with 10.1-RELEASE.

Submitted by:	Wei Hu <weh microsoft com>
MFC after:	1 week
2014-09-13 02:15:31 +00:00
Konstantin Belousov
d3b06cf2be Document the whole settings needed to build a debug version of rtld.
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
2014-08-29 10:44:58 +00:00
Konstantin Belousov
74b0daf4f9 Optimize r270798, only do the second pass over non-plt relocations
when the first pass found IFUNCs.

Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2014-08-29 10:43:56 +00:00
Konstantin Belousov
14c3564759 IFUNC symbol type shall be processed for non-PLT relocations,
e.g. when a global variable is initialized with a pointer to ifunc.
Add symbol type check and call resolver for STT_GNU_IFUNC symbol types
when processing non-PLT relocations, but only after non-IFUNC
relocations are done.  The two-phase proceessing is required since
resolvers may reference other symbols, which must be ready to use when
resolver calls are done.

Restructure reloc_non_plt() on x86 to call find_symdef() and handle
IFUNC in single place.

For non-x86 reloc_non_plt(), check for call for IFUNC relocation and
do nothing, to avoid processing relocs twice.

PR:	193048
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2014-08-29 09:29:10 +00:00
Konstantin Belousov
e404dc33e2 Remove stray newline. 2014-08-27 00:48:09 +00:00
Enji Cooper
35829c84f1 Fix "make checkdpadd" by "spoofing" DPADD
Approved by: jmmv (mentor)
Phabric: D631
PR: 192769
2014-08-26 09:01:11 +00:00
Pedro F. Giffuni
0fa46a4231 Always check the limits of array index variables before using them.
Obtained from:	DragonFlyBSD
MFC after:	1 week
2014-08-21 02:40:33 +00:00
Bryan Drewery
5608fd23c2 Revert r267233 for now. PIE support needs to be reworked.
1. 50+% of NO_PIE use is fixed by adding -fPIC to INTERNALLIB and other
   build-only utility libraries.
2. Another 40% is fixed by generating _pic.a variants of various libraries.
3. Some of the NO_PIE use is a bit absurd as it is disabling PIE (and ASLR)
   where it never would work anyhow, such as csu or loader. This suggests
   there may be better ways of adding support to the tree. Many of these
   cases can be fixed such that -fPIE will work but there is really no
   reason to have it in those cases.
4. Some of the uses are working around hacks done to some Makefiles that are
   really building libraries but have been using bsd.prog.mk because the code
   is cleaner. Had they been using bsd.lib.mk then NO_PIE would not have
   been needed.

We likely do want to enable PIE by default (opt-out) for non-tree consumers
(such as ports). For in-tree though we probably want to only enable PIE
(opt-in) for common attack targets such as remote service daemons and setuid
utilities. This is also a great performance compromise since ASLR is expected
to reduce performance. As such it does not make sense to enable it in all
utilities such as ls(1) that have little benefit to having it enabled.

Reported by:	kib
2014-08-19 15:04:32 +00:00
Neel Natu
06224a9492 Remove LOG_ODELAY because it does nothing.
Reviewed by:	jilles
CR:		https://reviews.freebsd.org/D611
2014-08-17 19:06:26 +00:00
Baptiste Daroussin
d029c3aa25 Rework privatelib/internallib
Make sure everything linking to a privatelib and/or an internallib does it directly
from the OBJDIR rather than DESTDIR.
Add src.libnames.mk so bsd.libnames.mk is not polluted by libraries not existsing
in final installation
Introduce the LD* variable which is what ld(1) is expecting (via LDADD) to link to
internal/privatelib
Directly link to the .so in case of private library to avoid having to complexify
LDFLAGS.

Phabric:	https://phabric.freebsd.org/D553
Reviewed by:	imp, emaste
2014-08-06 22:17:26 +00:00
Enji Cooper
fd5c99b51e Similar to r269506, fix LIBDIR to not duplicate TESTSDIR
Phabric: D536
Reviewed by: jmmv
Approved by: jmmv (mentor)
Sponsored by: EMC / Isilon Storage Division
2014-08-05 18:09:39 +00:00
Enji Cooper
522da0b0ad Remove unnecessary .PATH directive
All of the sources for the tests are contained in the
current working directory and the subdirectories

Phabric: D537
Reviewed by: jmmv
Approved by: jmmv (mentor)
Sponsored by: EMC / Isilon Storage Division
2014-08-05 18:05:31 +00:00
Enji Cooper
2db8752cef Fix BINDIR to not duplicate "${TESTSDIR}
This should fix 'make release' with MK_TESTS != no

Phabric: D525 (part of a larger patch)

Reviewed by: jmmv
Approved by: jmmv (co-mentor)
2014-08-04 05:50:21 +00:00
Enji Cooper
07014efe94 Move a -L argument from LDADD to LDFLAGS
Phabric: D525 (part of a larger patch)

Reviewed by: jmmv
Approved by: jmmv (co-mentor)
2014-08-04 05:49:13 +00:00
Enji Cooper
35e8923e7e Fix a -Wsecurity warning with clang
Phabric: D525 (part of a larger patch)

Reviewed by: jmmv
Approved by: jmmv (co-mentor)
2014-08-04 05:46:10 +00:00