Commit Graph

300 Commits

Author SHA1 Message Date
emaste
eada66b378 csu: use BSD-1-clause license on csu files
Copyright on these files is held by kib@ and/or the Foundation, and both
agree to this change.

Approved by:	kib
2018-11-20 21:04:20 +00:00
emaste
177d0f3207 Add NT_FREEBSD_FEATURE_CTL ELF note to csu
This note will be used to allow binaries to opt out of, or in to,
upcoming vulnerability mitigation and other features.  It is not yet
connected but being added now to facilitate testing and ensure
compatibility with existing kernels and tools.

Reviewed by:	brooks, jhb, kib, markj
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17438
2018-11-20 20:59:49 +00:00
andrew
891f5786f6 Run __cxa_finalize in shared objects in the destructor path.
When we have .dtors call them before .dtor handling, otherwise call from
a destructor.

PR:		233056
MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-11-13 15:28:27 +00:00
andrew
573e268cd6 Add the (untested) mips and sparc64 .init call sequences.
The BSD crtbegin/crtend code now builds on all architectures, however
further work is needed to check if it works correctly.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-11-07 09:49:25 +00:00
emaste
d7f804e35b Add __used to __CTOR_LIST__ and __DTOR_LIST__
Enabling BSD_CRTBEGIN on amd64 resulted in
error: unused variable '__CTOR_LIST__'.

__CTOR_LIST__ is indeed unused in crtbegin.c; it marks the beginning of
the .ctors array and is used in crtend.c.  Annotate __DTOR_LIST__ as
well for consistency.

Discussed with:	andrew
MFC with:	r339738
Sponsored by:	The FreeBSD Foundation
2018-10-31 14:19:58 +00:00
andrew
c0494f25ad Build the csu tests on all architectures.
The tests haven't been run them, but this is enough to build them so I can
get feedback on if the various crt.h headers are correct.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-30 14:44:12 +00:00
andrew
d5f35b1f79 Disable the .preinit_array test in DSOs, ld.bfd fails to link objects with
the section.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-30 11:19:47 +00:00
andrew
5e8dfc23bc Fix the location of the static keyword.
MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-30 10:16:21 +00:00
andrew
9e6da10645 Run the csu tests on a DSO. This builds the tests into a shared library,
then runs these from the base test programs. With this we can check
crtbeginS.o and crtendS.o are working as expected.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-30 09:43:26 +00:00
andrew
6660b31759 The jcr argument to _Jv_RegisterClasses is used, stop marking it otherwise.
MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-30 09:36:31 +00:00
andrew
f75f4c1705 Make the .ctors, .dtors, and .jcr markers as static. They shouldn't be
accessible from out of the files they are defined in.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-29 17:55:26 +00:00
andrew
d66b2778e3 Check __dso_handle is NULL in non-DSO objects. It should only be non-NULL
when accessed from a shared object.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-29 17:03:20 +00:00
andrew
1f5206e35e Add __dso_handle to the BSD crtbegin. This is used to identify shared
objects.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-26 11:53:20 +00:00
andrew
265606d643 Drop the csu tests WARNS to 5 to fix the powerpc64 build.
MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-26 08:12:28 +00:00
andrew
21add28404 Add a missing include for src.opts.mk. Without it MK_TESTS isn't defined.
MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-25 21:08:15 +00:00
andrew
5ca9ee52a8 Implement a BSD licensed crtbegin/crtend
These are needed for .ctors/.dtors and .jcr handling. The former needs
all the function pointers to be called in the correct order from the
.init/.fini section. The latter just needs to call a gcj specific function
if it exists with a pointer to the start of the .jcr section.

This is currently disabled until __dso_handle support is added.

Reviewed by:	emaste
MFC after:	1 month
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17587
2018-10-25 17:39:41 +00:00
kib
fafef42308 Process irelocs for statically linked binaries from crt1 on x86.
This makes statically linked binaries with ifuncs operational.

Reported and tested by:	mjg
Reviewed by:	emaste, markj
Sponsored by:	The FreeBSD Foundation
Approved by:	re (rgrimes)
Differential revision:	https://reviews.freebsd.org/D17363
2018-10-13 23:52:55 +00:00
emaste
b4764e4a0e crt: switch to standard note type definitions from elf_common.h
This makes it easier to grep the source tree for these notes, and
ensures that they will remain in sync.

Reviewed by:	kib
Approved by:	re (gjb)
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17408
2018-10-04 17:35:32 +00:00
pfg
260ba0bff1 lib: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-26 02:00:33 +00:00
eadler
45275e3a26 Update several more URLs
- Primarily http -> https
- Primarily FreeBSD project URLs
2017-10-29 08:17:03 +00:00
jhb
9d9338ffa9 Don't include GNU object attributes when building with clang.
LLVM's MIPS assembler parser does not understand the GNU as
'.gnu_attribute' keyword.  This could be re-enabled if LLVM is updated
in the future.  The desired floating point ABI is already described in
the .MIPS.abiflags section.

Reviewed by:	emaste
Sponsored by:	DARPA / AFRL
2017-08-30 19:19:31 +00:00
br
b002bfbade Support for v1.10 (latest) of RISC-V privilege specification.
New version is not compatible on supervisor mode with v1.9.1
(previous version).

Highlights:
    o BBL (Berkeley Boot Loader) provides no initial page tables
      anymore allowing us to choose VM, to build page tables manually
      and enable MMU in S-mode.
    o SBI interface changed.
    o GENERIC kernel.
      FDT is now chosen standard for RISC-V hardware description.
      DTB is now provided by Spike (golden model simulator). This
      allows us to introduce GENERIC kernel. However, description
      for console and timer devices is not provided in DTB, so move
      these devices temporary to nexus bus.
    o Supervisor can't access userspace by default. Solution is to
      set SUM (permit Supervisor User Memory access) bit in sstatus
      register.
    o Compressed extension is now turned on by default.
    o External GCC 7.1 compiler used.
    o _gp renamed to __global_pointer$
    o Compiler -march= string is now in use allowing us to choose
      required extensions (compressed, FPU, atomic, etc).

Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D11800
2017-08-10 14:18:09 +00:00
jhb
450a870955 Rework r234502 to include a modified CFLAGS along with ACFLAGS.
On most architectures crt objects are compiled in a multiple-step process
so that sed can be run on the generated assembly.  As the final step,
the C compiler generates an object file from the modified assembly output.
Currently this last step uses $CC with only $ACFLAGS.  However, for other
uses in the tree, $ACFLAGS is meant to include assembly-specific compiler
flags that are in addition to $CFLAGS (see default .S.o rules
bsd.suffixes.mk).  In particular, external toolchains may require
additional flags to select a non-default target which will be present
in CFLAGS but not ACFLAGS.  To support this while still mitigating the
issue with CFLAGS described in r234502, include a modified CFLAGS that
excludes "-g" when assembling the modified assembly files.

Note that normally an assembler ($AS) is used to assemble .s flags to
object files (see bsd.suffixes.mk).  However, llvm-based toolchains do
not currently have a stand-alone assembler.

Reviewed by:	imp
Sponsored by:	DARPA / AFRL
Differential Revision:	https://reviews.freebsd.org/D10085
2017-04-07 19:53:14 +00:00
jhibbits
34998ef9b5 Clang in base now supports -mlongcall, so remove this hack
PR:		215947
MFC after:	2 weeks
2017-03-07 02:17:38 +00:00
ngie
43df15f345 Use SRCTOP-relative paths and .CURDIR with :H instead of ".." specified paths
This implifies pathing in make/displayed output

MFC after:    3 weeks
Sponsored by: Dell EMC Isilon
2017-01-20 03:52:16 +00:00
kan
d9106c4087 Make MIPS startup assembly files use neutral float ABI.
This allows these files to be used with hard and softfloat targets
with no special flags passed to the compiler.

Reviewed by: adrian, br, imp
Differential Revision:	https://reviews.freebsd.org/D8506
2016-11-16 03:21:49 +00:00
andrew
cb152b7815 Stop dereferencing _end in crt1.c. This was only needed for brk/sbrk so is
no longer needed.

Sponsored by:	ABT Systems Ltd
2016-05-22 08:20:30 +00:00
bdrewery
247ac6101d Don't reset CC away from full-pathed gcc.
This was breaking the build when using CROSS_TOOLCHAIN=powerpc64-gcc

Sponsored by:	EMC / Isilon Storage Division
2016-03-24 21:48:10 +00:00
andrew
8298ebeec0 Remove the compat code to handle the kernel passing us an unalinged
stackpointer. Userland expects the kernel to pass it an aligned sp and
pass a pointer to the arguments in x0. The kernel side was updated in
r289502, 3 months ago.

Sponsored by:	ABT Systems Ltd
2016-01-13 15:54:17 +00:00
andrew
6b8d860df3 Use -mlong-calls to build crt1.o and gcrt1.o. This tells the compiler to
generate code to branch based on an address in a register. This allows us
to have binaries larger than the 32MiB limit of a branch instruction.

The main use of this is with clang. Clang 3.8.0 has been shown to be larger
than the above limit.
2016-01-10 23:41:31 +00:00
br
e10e8212ee Start support for the RISC-V 64-bit architecture developed by UC Berkeley.
RISC-V is a new ISA designed to support computer research and education, and
is now become a standard open architecture for industry implementations.

This is a minimal set of changes required to run 'make kernel-toolchain'
using external (GNU) toolchain.

The FreeBSD/RISC-V project home: https://wiki.freebsd.org/riscv.

Reviewed by:	andrew, bdrewery, emaste, imp
Sponsored by:	DARPA, AFRL
Sponsored by:	HEIF5
Differential Revision:	https://reviews.freebsd.org/D4445
2015-12-11 22:55:23 +00:00
emaste
e75386a996 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 csu.

Sponsored by:	The FreeBSD Foundation
2015-12-08 19:32:58 +00:00
nwhitehorn
4bced8674e Provide support for ELFv2 userland if using a newer compiler (recent clang
or gcc) and binutils >= 2.24. Not enabled by default.
2015-12-03 00:10:57 +00:00
kib
2b6ac44d5d 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
bdrewery
459799dc3d 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
bdrewery
f37faa57f7 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
bdrewery
22c9fba62b 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
bdrewery
3cec2c22f8 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
e48bb98eda 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
8f12ad25e4 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
sjg
008d7c831f 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
sjg
75a137820d dirdeps.mk now sets DEP_RELDIR 2015-06-08 23:35:17 +00:00
sjg
65145fa4c8 Merge sync of head 2015-05-27 01:19:58 +00:00
emaste
4728e8f31f 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
dim
fd4e4ae147 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
0c72282747 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
jhibbits
432ea6dda0 Add a comment explaining why gcc is needed.
X-MFC-With:	278231
MFC after:	2 weeks
2015-02-06 02:35:29 +00:00
jhibbits
607b4e91ba 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
sjg
5a7fe0500d 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
sjg
b137080f19 Merge from head@274682 2014-11-19 01:07:58 +00:00