1
0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-05 09:14:03 +00:00
Commit Graph

259 Commits

Author SHA1 Message Date
Konstantin Belousov
96cdb0ab9d Annotate arm userspace assembler sources stating their tolerance to
the non-executable stack.

Reviewed by:	andrew
Sponsored by:	The FreeBSD Foundation
2015-09-29 16:09:58 +00:00
Bryan Drewery
ec766071e3 META_MODE: Remove DEP_MACHINE from Makefile.depend files.
This has not been needed since r246865 in projects/bmake.

Sponsored by:	EMC / Isilon Storage Division
2015-09-25 19:44:01 +00:00
Bryan Drewery
54c7d75a06 META_MODE: Remove DEP_RELDIR from Makefile.depend files.
This has not been needed since r284171 in projects/bmake.

Sponsored by:	EMC / Isilon Storage Division
2015-09-25 19:26:08 +00:00
Bryan Drewery
7c6cc9de3a Fix installation of 32bit libraries after r288074.
FILES is not used when LIBRARIES_ONLY is set, which is used to build and
install the lib32 sysroot.  All of the csu files do quality as "libraries"
for this case so just undefine LIBRARIES_ONLY.

This is still better than the previous realinstall handling as it does
not hook into META_MODE properly.

Sponsored by:	EMC / Isilon Storage Division
2015-09-21 21:44:02 +00:00
Bryan Drewery
5ca34122ec Replace realinstall: and META_MODE staging hacks with FILES mechanism.
This partially reverts r270170 for lib/csu/i386 while retaining the
change for using bsd.lib.mk.

These FILES groups could go into lib/csu/Makefile.inc but I've kept them
in the Makefiles for clarity.

Sponsored by:	EMC / Isilon Storage Division
2015-09-21 18:39:13 +00:00
Andrew Turner
b339ef955c Force the dynamic linker to resolve _end early so we pick up the correct
copy.

Sponsored by:	ABT Systems Ltd
2015-07-02 15:02:59 +00:00
Andrew Turner
65706c12b2 Add a workaround to correctly align the stack before calling into C code.
When enough time has passed for users to update their userland the kernel
fix will be applied. This will change the ABI to have x0 point to the args
and sp be correctly aligned.

It is expected this compatibility code can be removed when the kernel and
qemu usermode emulation have both been updated for the new ABI.

This fixes clang failures, and most likely other crashes.

Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
2015-06-22 19:43:08 +00:00
Simon J. Gerraty
ccfb965433 Add META_MODE support.
Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.

Still need to add real targets under targets/ to build packages.

Differential Revision:       D2796
Reviewed by: brooks imp
2015-06-13 19:20:56 +00:00
Simon J. Gerraty
44d314f704 dirdeps.mk now sets DEP_RELDIR 2015-06-08 23:35:17 +00:00
Simon J. Gerraty
98e0ffaefb Merge sync of head 2015-05-27 01:19:58 +00:00
Ed Maste
302af79506 All FreeBSD platforms are elf: move i386-elf to i386
This was a leftover from when we had both i386 a.out and ELF.

Reviewed by:	kib, imp
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D2591
2015-05-19 21:00:53 +00:00
Dimitry Andric
76e2c537bc Ensure the cross assembler, linker and objcopy are used for the build32
stage, just like for the regular world stage.

Reviewed by:	rodrigc, imp, bapt, emaste
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D2187
2015-04-02 06:58:17 +00:00
Andrew Turner
8daa81674e Start to import support for the AArch64 architecture from ARM. This change
only adds support for kernel-toolchain, however it is expected further
changes to add kernel and userland support will be committed as they are
reviewed.

As our copy of binutils is too old the devel/aarch64-binutils port needs
to be installed to pull in a linker.

To build either TARGET needs to be set to arm64, or TARGET_ARCH set to
aarch64. The latter is set so uname -p will return aarch64 as existing
third party software expects this.

Differential Revision:	https://reviews.freebsd.org/D2005
Relnotes:	Yes
Sponsored by:	The FreeBSD Foundation
2015-03-19 13:53:47 +00:00
Justin Hibbits
4656c46d63 Add a comment explaining why gcc is needed.
X-MFC-With:	278231
MFC after:	2 weeks
2015-02-06 02:35:29 +00:00
Justin Hibbits
35eeacca92 powerpc64 csu needs to be built by gcc, so enforce that.
With this change, world is one step closer to being clang-able.

MFC after:	2 weeks
2015-02-05 03:56:49 +00:00
Simon J. Gerraty
6e7d005c83 Put lib/csu/amd64/Makefile back the way it is in head
and handle staging via ../Makefile.inc
2014-11-30 18:42:29 +00:00
Simon J. Gerraty
9268022b74 Merge from head@274682 2014-11-19 01:07:58 +00:00
Bryan Drewery
6855730b5c Use bsd.lib.mk here as all other csu Makefiles do.
This effectively reverts r124752.

There's no reason this should be different. It resulted in needing NO_PIE in
the original opt-out NO_PIE commit as this was not using the proper framework.

Reported by:	peter
2014-08-19 15:30:56 +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
Simon J. Gerraty
ee7b0571c2 Merge head from 7/28 2014-08-19 06:50:54 +00:00
Simon J. Gerraty
5b6dc2efc9 Reviewed by: imp
LDFLAGS is supposed to be given to CC not LD.
Define _LDFLAGS as a filtered version of LDFLAGS safe to give to LD
2014-07-26 04:38:09 +00:00
Marcel Moolenaar
e7d939bda2 Remove ia64.
This includes:
o   All directories named *ia64*
o   All files named *ia64*
o   All ia64-specific code guarded by __ia64__
o   All ia64-specific makefile logic
o   Mention of ia64 in comments and documentation

This excludes:
o   Everything under contrib/
o   Everything under crypto/
o   sys/xen/interface
o   sys/sys/elf_common.h

Discussed at: BSDcan
2014-07-07 00:27:09 +00:00
Bryan Drewery
864c53ead8 In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE.
This is currently an opt-in build flag. Once ASLR support is ready and stable
it should changed to opt-out and be enabled by default along with ASLR.

Each application Makefile uses opt-out to ensure that ASLR will be enabled by
default in new directories when the system is compiled with PIE/ASLR. [2]

Mark known build failures as NO_PIE for now.

The only known runtime failure was rtld.

[1] http://www.bsdcan.org/2014/schedule/events/452.en.html
Submitted by:		Shawn Webb <lattera@gmail.com>
Discussed between:	des@ and Shawn Webb [2]
2014-06-08 17:29:31 +00:00
Simon J. Gerraty
9d2ab4a62d Merge head 2014-04-27 08:13:43 +00:00
Olivier Houchard
122990a379 Use the size of the MACHINE_ARCH string instead of sizeof(uint32_t). It can
happen sizeof(MACHINE_ARCH) is more than 4 bytes, and bad things would
happen. This should make the ctors being called again on armeb.
2013-10-27 23:48:59 +00:00
Simon J. Gerraty
3caf0790a8 Merge head@256284 2013-10-13 02:35:19 +00:00
Andrew Turner
27b7672219 Add an elf note on ARM to store the MACHINE_ARCH an executable was built
for. This is useful for software needing to know which architecture a
binary is built for as arm and armv6 have slight differences meaning only
some binaries build for one will work as expected on the other. It is
expected pkgng will be able to make use of this to simplify the logic to
determine which package ABI to use.

Approved by:	re (kib)
2013-09-26 07:53:18 +00:00
Simon J. Gerraty
d1d0158641 Merge from head 2013-09-05 20:18:59 +00:00
Marcel Moolenaar
e9d8fda02c Add a makefle that recurses into the right architecture-specific
sub-directory. This to allow simpler logic outside of the csu
directory.

Obtained from:	Juniper Networks, Inc.
2013-05-21 17:47:53 +00:00
Ed Schouten
7e659f9491 Add the Clang specific -Wmissing-variable-declarations to WARNS=6.
This compiler flag enforces that that people either mark variables
static or use an external declarations for the variable, similar to how
-Wmissing-prototypes works for functions.

Due to the fact that Yacc/Lex generate code that cannot trivially be
changed to not warn because of this (lots of yy* variables), add a
NO_WMISSING_VARIABLE_DECLARATIONS that can be used to turn off this
specific compiler warning.

Announced on:	toolchain@
2013-04-19 19:45:00 +00:00
Simon J. Gerraty
f5f7c05209 Updated dependencies 2013-02-16 01:23:54 +00:00
David E. O'Brien
d9a447559b Sync with HEAD. 2013-02-08 16:10:16 +00:00
Konstantin Belousov
d549ead6a9 Only assign the environ in the startup code when environ is NULL.
Preloaded library could have changed the environment, and
unconditional assingment to the environ undoes the customization.
The binaries needs to be recompiled to get the fix.

Move the common code to set up environ and __progname into the helper.
Note that ia64 possibly not fixed, due to it still using old csu.

Reported and tested by:	John Hein <jhein@symmetricom.com>
Reviewed by:	kan, scf
Approved by:	secteam (simon)
MFC after:	2 weeks
2013-01-07 17:58:27 +00:00
Simon J. Gerraty
23090366f7 Sync from head 2012-11-04 02:52:03 +00:00
Marcel Moolenaar
7750ad47a9 Sync FreeBSD's bmake branch with Juniper's internal bmake branch.
Requested by: Simon Gerraty <sjg@juniper.net>
2012-08-22 19:25:57 +00:00
Dimitry Andric
db3212b375 Revert r234356 for now, as it leads to run-time problems on 32-bit
PowerPC.  Note this will break world.

Reported by:	andreast
Pointy hat to:	dim
2012-04-23 06:33:27 +00:00
Dimitry Andric
d2cc835cb5 After r217375, some startup objects under lib/csu are built in a special
way: first they are compiled to assembly, then some sed'ing is done on
the assembly, and lastly the assembly is compiled to an object file.

This last step is done using ${CC}, and not ${AS}, because when the
compiler is clang, it outputs directives that are too advanced for our
old gas.  So we use clang's integrated assembler instead.  (When the
compiler is gcc, it just calls gas, and nothing is different, except one
extra fork.)

However, in the .s to .o rules in lib/csu/$ARCH/Makefile, I still passed
CFLAGS to the compiler, instead of ACFLAGS, which are specifically for
compiling .s files.

In case you are using '-g' for debug info anywhere in your CFLAGS, it
causes the .s files to already contain debug information in the assembly
itself.  In the next step, the .s files are also compiled using '-g',
and if the compiler is clang, it complains: "error: input can't have
.file dwarf directives when -g is used to generate dwarf debug info for
assembly code".

Fix this by using ${ACFLAGS} for compiling the .s files instead.

Reported by:	jasone
MFC after:	1 week
2012-04-20 21:00:39 +00:00
Dimitry Andric
4f78aa4725 Work around an issue on 32-bit PowerPC, where clang executable can get
too big, causing 'relocation truncated to fit' errors at link time.

Reviewed by:	nwhitehorn
2012-04-16 21:36:55 +00:00
Nathan Whitehorn
cce345c2c9 Work around a binutils bug on powerpc64 where the TOC would not be
properly reloaded when calling _fini() in large binaries with multiple
TOC sections (e.g. GCC), leading to a segmentation fault. Adding -mlongcall
to crt1 flags causes the compiler to emit explicit TOC load instructions
for all function calls, including _fini().

Reviewed by:	kib
Pointy hat to:	kib
2012-03-13 18:59:19 +00:00
Konstantin Belousov
a22748dbd9 Stop calling _init/_fini methods from crt1 for dynamic binaries. Do
call preinit, init and fini arrays methods from crt1 for static binaries.

Mark new crt1 with FreeBSD-specific ELF note.

Move some common crt1 code into new MI file ignore_init.c, to reduce
duplication.  Also, conservatively adjust nearby sources for style.

Reviewed by:	kan
Tested by:	andrew (arm), flo (sparc64)
MFC after:	3 weeks
2012-03-11 20:04:09 +00:00
Konstantin Belousov
d1545c15cf Add a header with definitions useful for constructing ELF notes.
Reviewed by: kan
MFC after:   3 weeks
2012-03-11 19:56:58 +00:00
Oleksandr Tymoshenko
dae259f8c4 - Remove one more no-op #ifndef 2012-03-06 19:19:33 +00:00
Oleksandr Tymoshenko
dd2f96800b - Remove NOSHARED parts since it seems to be no-op
- Call _init_tls for statically linked binaries
2012-03-06 03:29:46 +00:00
Nathan Whitehorn
68a108e626 Build Scrt.o on powerpc64. Its introduction on other platforms got lost
during the period of time the powerpc64 port was on a project branch.
2011-06-27 16:24:36 +00:00
Nathan Whitehorn
79c77d726e Turn off default generation of userland dot symbols on powerpc64 now that
we have a binutils that supports it. Kernel dot symbols remain on to assist
DDB.
2011-02-18 21:44:53 +00:00
Warner Losh
41ea72bd1d Whitespace nit 2011-02-01 22:50:23 +00:00
Konstantin Belousov
33e6b543c7 Mark csu on PowerPC as not requiring executable stack.
Reviewed and tested by:	nwhitehorn
2011-01-14 11:34:58 +00:00
Konstantin Belousov
ea40bc90e1 The (%esp & 0xf) == 0 should be true before the call instruction is
executed, for the properly aligned stack.

Reported and tested by:	rstone
Pointy hat to:	kib
MFC after:	3 days
2011-01-13 23:00:22 +00:00
Dimitry Andric
9ef4e3afcb Apply a workaround for a binutils issue with the .note.ABI-tag section
generated from lib/csu/common/crtbrand.c (which ultimately ends up in
executables and shared libraries, via crt1.o, gcrt1.o or Scrt1.o).

For all arches except sparc, gcc emits the section directive for the
abitag struct in crtbrand.c with a PROGBITS type.  However, newer
versions of binutils (after 2.16.90) require the section to be of NOTE
type, to guarantee that the .note.ABI-tag section correctly ends up in
the first page of the final executable.

Unfortunately, there is no clean way to tell gcc to use another section
type, so crtbrand.c (or the C files that include it) must be compiled in
multiple steps:

- Compile the .c file to a .s file.
- Edit the .s file to change the 'progbits' type to 'note', for the section
  directive that defines the .note.ABI-tag section.
- Compile the .s file to an object file.

These steps are done in the invididual Makefiles for each applicable arch.

Reviewed by:	kib
2011-01-13 20:44:31 +00:00
Konstantin Belousov
88c23d858b Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:07:51 +00:00