Commit Graph

300 Commits

Author SHA1 Message Date
Bryan Drewery
dcf1f83876 Support reading in .depend files.
This is for an upcoming change that fixes .depend handling in here.
It will cause some duplicate sources which need to be trimmed out.

MFC after:	2 weeks
Sponsored by:	DellEMC
2019-06-15 17:08:32 +00:00
Ed Maste
b0ec537031 mips: remove 16-byte alignment from .init and .fini epilogues
The .init and .fini epilogues from crtn should be placed immediately
after any instructions in .init and .fini sections from the linked
objects.  Using 16-byte alignment for the epilogues on MIPS was a bug,
but it did not cause any issue with GNU ld as GNU ld (2.17.50) fills the
padding with NOPs.

Current versions of LLD fill any padding between different object files
with trap instructions.  Inserting trap padding prior to the .init/.fini
epilogue is undesriable as the resulting binary will crash at runtime.

The .init and .fini sections in object files linked between crti and
crtn must already be a multiple of the instruction size and so no
alignment directive is required in crtn.  Indeed, other architectures
(except sparc64) do not specify alignment in their crtn implementations.

Reported by:	arichardson
Reviewed by:	andrew
Event:		Waterloo Hackathon 2019
Differential Revision:	https://reviews.freebsd.org/D18291
2019-05-20 20:48:04 +00:00
Justin Hibbits
5d031e332f Create crtsavres.o for powerpc builds
Summary:
GCC expects to link in a crtsavres.o on powerpc platforms.  On
powerpc64 this is an empty file, but on powerpc and powerpcspe this does contain
some save/restore functions, which may not actually be necessary for newer
modern GCC and clang.  This appeases the in-tree gcc, though, and is needed in
order to switch to the BSD CRTRBEGIN.

PR:	233751
Reviewed By: andrew
Differential Revision: https://reviews.freebsd.org/D18826
2019-01-12 21:29:54 +00:00
Ed Maste
6871d48825 Add explicit csu test dependency
lib/csu/tests/dynamiclib requires libh_csu.so be built first.  I'm not
sure this is the most correct/best way to address this but it solves
the issue in my testing.

PR:		233734
Sponsored by:	The FreeBSD Foundation
2019-01-04 18:35:25 +00:00
Andrew Turner
266900be14 Re-enable the dynamiclib tests. These should be fixed by r340910. 2018-11-24 18:25:00 +00:00
Andrew Turner
e5c0fd4be6 Add the missing 0 at the end of the .jcr section.
Without this the dynamic library test was failing as it was calling
_Jv_RegisterClasses multiple times.
2018-11-24 18:23:53 +00:00
Andrew Turner
ab1e0d2410 Disable the dynamiclib test until a failure can be debugged 2018-11-24 16:05:40 +00:00
Andrew Turner
e1fa5626cf Mark the function called by the MIPS .init/.fini sequence with .local.
As with r328939 we need to mark local symbols as such. Without this the
assembly parser treats the symbols as global and created relocations
against these private symbols.

MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-11-23 16:33:03 +00:00
Ed Maste
b18e62b6da 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
Ed Maste
bbce18b8d1 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 Turner
b7305f91e4 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 Turner
a0e4ca397e 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
Ed Maste
57706376c6 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 Turner
8522d140a5 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 Turner
ca34591f29 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 Turner
bb966f87bc Fix the location of the static keyword.
MFC with:	r339738
Sponsored by:	DARPA, AFRL
2018-10-30 10:16:21 +00:00
Andrew Turner
6ec0ee844c 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 Turner
9e26e65c16 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 Turner
fb7128c25e 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 Turner
235130433a 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 Turner
fd8767bb69 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 Turner
4b48b463ed 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 Turner
812c4fa807 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 Turner
31d62a73c2 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
Konstantin Belousov
bdafb02fcb 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
Ed Maste
2284664ef9 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
Pedro F. Giffuni
5e53a4f90f 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
Eitan Adler
a2aef24aa3 Update several more URLs
- Primarily http -> https
- Primarily FreeBSD project URLs
2017-10-29 08:17:03 +00:00
John Baldwin
e896328044 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
Ruslan Bukin
af19cc59ca 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
John Baldwin
5944f899a2 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
Justin Hibbits
90b4425549 Clang in base now supports -mlongcall, so remove this hack
PR:		215947
MFC after:	2 weeks
2017-03-07 02:17:38 +00:00
Enji Cooper
23f6875a43 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
Alexander Kabaev
20d197f463 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 Turner
46c1105fbb 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
Bryan Drewery
de0fbc4dbc 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 Turner
fafb1ee7bd 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 Turner
84eacaf728 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
Ruslan Bukin
1fdcc5e5c0 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
Ed Maste
c6a33c8e88 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
Nathan Whitehorn
29ba9b6124 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
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