Commit Graph

210 Commits

Author SHA1 Message Date
Ed Maste
bcf99d2d99 Add WITH_PIE knob to build Position Independent Executables
Building binaries as PIE allows the executable itself to be loaded at a
random address when ASLR is enabled (not just its shared libraries).

With this change PIE objects have a .pieo extension and INTERNALLIB
libraries libXXX_pie.a.

MK_PIE is disabled for some kerberos5 tools, Clang, and Subversion, as
they explicitly reference .a libraries in their Makefiles.  These can
be addressed on an individual basis later.  MK_PIE is also disabled for
rtld-elf because it is already position-independent using bespoke
Makefile rules.

Currently only dynamically linked binaries will be built as PIE.

Discussed with:	dim
Reviewed by:	kib
MFC after:	1 month
Relnotes:	Yes
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18423
2019-02-15 22:22:38 +00:00
Dimitry Andric
67350cb56a Merge ^/head r340918 through r341763. 2018-12-09 11:39:45 +00:00
Ed Maste
2431a6854d llvm-objdump.1: remove more unintentional options
Some options come from static constructors in LLVM libraries and are
automatically added to llvm's usage output.  They're not really supposed
to be llvm-objdump options.

Reported by:	Fangrui Song in LLVM review D54864
Sponsored by:	The FreeBSD Foundation
2018-11-27 13:52:51 +00:00
Ed Maste
6b31818dee llvm-objdump.1: fix igor / mandoc -Tlint warnings
Accidentally omitted from r340972.
2018-11-26 15:12:58 +00:00
Ed Maste
7a1772ed42 llvm-objdump.1: remove invalid options
Some options appear in llvm-objdump's usage information as a side effect
of its option parsing implementation and are not actually llvm-objdump
options.  Reported in LLVM review https://reviews.llvm.org/D54864.

Reported by:	Fangrui Song
Sponsored by:	The FreeBSD Foundation
2018-11-26 14:45:58 +00:00
Ed Maste
801cfbaa3f llvm-objdump: initial man page
Based on llvm-objdump's online documentation and usage information.
This serves as a starting point; additional detail and cleanup still
required.

Also being submitted upstream in LLVM review D54864.  I expect to use
this bespoke copy while we have LLVM 6.0 or 7.0 in FreeBSD; when we
update to LLVM 8.0 it should be upstream and we will switch to it.

PR:		233437
Reviewed by:	bcr (man formatting)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18309
2018-11-26 14:34:30 +00:00
Dimitry Andric
9b5cb2f639 Merge ^/head r340235 through r340367. 2018-11-12 16:41:41 +00:00
Ed Maste
e8bd280446 Move llvm-profdata build into MK_LLVM_COV block
llvm-profdata is used with llvm-cov for code coverage (although llvm-cov
can also operate independently in a gcov-compatible mode).
Although llvm-profdata can be used independently of llvm-cov it makes
sense to group these under one option.

Also handle these in OptionalObsoleteFiles.inc while here.

Sponsored by:	The FreeBSD Foundation
2018-11-09 18:35:09 +00:00
Ed Maste
9f7331ad2c llvm-cov: also install as gcov (if GNU gcov is disabled)
llvm-cov provides a gcov-compatible interface when invoked as gcov.

Reviewed by:	dim, markj
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17923
2018-11-09 17:43:19 +00:00
Ed Maste
1ae9615a9a lld: add -z interpose support
-z interpose sets the DF_1_INTERPOSE flag, marking the object as an
interposer.

Committed upstream as LLVM r342239.

PR:		230604
Reported by:	jbeich
Reviewed by:	markj
Approved by:	re (kib)
MFC after:	1 week
Relnotes:	Yes
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17172
2018-09-14 15:15:16 +00:00
Mark Johnston
4023442dc9 Add an lld option to emit PC-relative relocations for ifunc calls.
The current kernel ifunc implementation creates a PLT entry for each
ifunc definition.  ifunc calls therefore consist of a call to the
PLT entry followed by an indirect jump.  The jump target is written
during boot when the kernel linker resolves R_[*]_IRELATIVE relocations.
This implementation is defined by requirements for userland code, where
text relocations are avoided.  This requirement is not present for the
kernel, so the implementation has avoidable overhead (namely, an extra
indirect jump per call).

Address this for now by adding a special option to the static linker
to inhibit PLT creation for ifuncs.  Instead, relocations to ifunc call
sites are passed through to the output file, so the kernel linker can
enumerate such call sites and apply PC-relative relocations directly
to the text section.  Thus the overhead of an ifunc call becomes exactly
the same as that of an ordinary function call.  This option is only for
use by the kernel and will not work for regular programs.

The final form of this optimization is up for debate; for now, this
change is simple and static enough to be acceptable as an interim
solution.

Reviewed by:	emaste
Discussed with:	arichardson, dim
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D16748
2018-08-23 14:58:19 +00:00
Ed Maste
899fb13bf4 lld: use now-upstream ld.lld.1 2018-08-02 20:31:54 +00:00
Dimitry Andric
e837c321f9 Regenerate clang.1. 2018-08-02 19:19:53 +00:00
Dimitry Andric
5c00527519 Update llvm tool manpages, and llvm-mca.1. 2018-08-02 19:11:56 +00:00
Dimitry Andric
29a348fe99 Update build glue to make WITH_LLD work. 2018-08-02 06:26:51 +00:00
Dimitry Andric
67b158f6ad Update build blue to make WITH_CLANG_EXTRAS and WITH_CLANG_FULL work. 2018-08-01 20:46:06 +00:00
Dimitry Andric
9f6e9a9f35 Make the minimal clang executable build. 2018-07-31 21:07:20 +00:00
Dimitry Andric
d1efe5165c Remove SRCS for files that have been deleted upstream. 2018-07-31 18:32:57 +00:00
Dimitry Andric
25194b54ad Make llvm-tblgen and clang-tblgen build. 2018-07-31 18:25:33 +00:00
Bryan Drewery
d74021d65b Rework how the ld link is handled in WORLDTMP from r322811.
LLD_BOOTSTRAP (build) is independent of LLD_IS_LD (installed) so they
should not be based on each other.

This is related to upcoming WITH_SYSTEM_LINKER work.

Reviewed by:	emaste
Sponsored by:	Dell EMC
Differential Revision:	https://reviews.freebsd.org/D15836
2018-06-20 16:10:02 +00:00
Dimitry Andric
621cbb9437 Regenerate clang man page after upstream change to document the possible
values for the -std= option.

Noticed by:	Steve Kargl
Obtained from:	https://reviews.llvm.org/rL329827
MFC after:	3 days
2018-04-11 18:39:47 +00:00
Ed Maste
1b49115a40 Promote llvm-cov to a standalone option
Introduce WITH_/WITHOUT_LLVM_COV to match GCC's WITH_/WITHOUT_GCOV.
It is intended to provide a superset of the interface and functionality
of gcov.

It is enabled by default when building Clang, similarly to gcov and GCC.

This change moves one file in libllvm to be compiled unconditionally.
Previously it was included only when WITH_CLANG_EXTRAS was set, but the
complexity of a new special case for (CLANG_EXTRAS | LLVM_COV) is not
worth avoiding a tiny increase in build time.

Reviewed by:	dim, imp
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D142645
2018-02-10 00:22:35 +00:00
Ed Maste
18f201e79c ld.lld.1: explain long options may use one or two dashes 2018-02-08 00:09:17 +00:00
Ed Maste
c62c1fe23e Update ld.lld.1 based on the version committed upstream 2018-02-07 23:58:00 +00:00
Ed Maste
5725799a3b ld.lld.1: miscellaneous style improvements
Submitted by:	wblock in review D13813
2018-02-02 21:52:00 +00:00
Dimitry Andric
62bd626920 Build llvm-extract with -lz, and add a few objects to liblldb, both of
which turn out to be needed when you don't use -ffunction-sections.

Reported by:	Shawn Webb <shawn.webb@hardenedbsd.org>
2018-01-13 13:53:05 +00:00
Dimitry Andric
c79126f2e4 Merge ^/head r327624 through r327885. 2018-01-12 18:23:35 +00:00
Ed Maste
71e8c9b65d lld: introduce basic man page
Upstream lld has no man page. Introduce a basic one for FreeBSD based on
ld.lld --help, with a brief introduction and additional detail for some
options.

We'll continue refining this in FreeBSD, and then submit it upstream once
the first round of edits are complete.

Submitted by:	krion, Arshan Khanifar, emaste, bjk
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D13813
2018-01-10 16:01:25 +00:00
Dimitry Andric
747dcddd1d Regenerate clang manpage. 2017-12-24 13:06:37 +00:00
Dimitry Andric
7435ffaa83 Regenerate llvm tools manpages, and add one for llvm-pbdutil. 2017-12-24 13:02:43 +00:00
Dimitry Andric
5e00e53008 Minimize library dependencies for some llvm tools. 2017-12-24 12:42:30 +00:00
Dimitry Andric
9509d906c1 Add new llvm-objcopy utility, enabled when MK_CLANG_EXTRAS=yes. 2017-12-24 12:36:31 +00:00
Dimitry Andric
2757ff7e2f Update clang, lld and llvm version numbers for r321414, and update build
glue.
2017-12-24 12:32:55 +00:00
Dimitry Andric
7bfc2d0f8e Next step in updating llvm/clang build glue: make lld build. 2017-12-22 16:27:29 +00:00
Dimitry Andric
3cd201a12f Next step in updating llvm/clang build glue: make the optional llvm and
clang tools build.
2017-12-22 13:28:10 +00:00
Dimitry Andric
36cb3905c9 First step in updating llvm/clang build glue: make only the clang
executable build.
2017-12-21 21:24:52 +00:00
Bryan Drewery
ea825d0274 DIRDEPS_BUILD: Update dependencies.
Sponsored by:	Dell EMC Isilon
2017-10-31 00:07:04 +00:00
John Baldwin
de6feefdb7 Improve the coverage of debug symbols for MK_DEBUG_FILES.
- Include debug symbols in static libraries.  This permits binaries
  to include debug symbols for functions obtained from static libraries.
- Permit the C/C++ compiler flags added for MK_DEBUG_FILES to be
  overridden by setting DEBUG_FILES_CFLAGS.  Use this to limit the debug
  information for llvm libraries and binaries.

Reviewed by:	emaste
Sponsored by:	DARPA / AFRL
Differential Revision:	https://reviews.freebsd.org/D12025
2017-08-23 23:30:25 +00:00
Dimitry Andric
c439438675 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r307894, and update
build glue.
2017-07-13 21:58:45 +00:00
Dimitry Andric
a580b01494 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r306956, and update
build glue.
2017-07-02 11:41:15 +00:00
Dimitry Andric
edd7eaddc8 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r306325, and update
build glue.
2017-06-27 06:40:39 +00:00
Dimitry Andric
24d58133b7 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r305575, and update
build glue.
2017-06-17 00:09:34 +00:00
Dimitry Andric
db17bf38c5 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r305145, and update
build glue.
2017-06-10 19:17:14 +00:00
Dimitry Andric
f9448bf33f Merge llvm, clang, lld, lldb, compiler-rt and libc++ r304460, and update
build glue.
2017-06-01 22:47:02 +00:00
Dimitry Andric
302affcb04 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r304149, and update
build glue.
2017-05-29 22:09:23 +00:00
Dimitry Andric
5517e702c0 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r303197, and update
build glue.
2017-05-16 21:50:29 +00:00
Dimitry Andric
0f5676f432 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r302418, and update
build glue.
2017-05-08 19:20:55 +00:00
Dimitry Andric
f37b6182a5 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r302069, and update
build glue (preliminary, not all option combinations work yet).
2017-05-03 21:54:55 +00:00
Dimitry Andric
51690af2a4 Merge llvm, clang, lld, lldb, compiler-rt and libc++ r301441, and update
build glue.
2017-04-26 22:33:09 +00:00
Dimitry Andric
b33474c89f Strip out a few objects from libclang, liblldb and lldb, which are not
referenced due to the selection of tools that we build, and our compile
time options.
2017-04-21 21:06:11 +00:00