Latest clang git has a warning -Wnull-pointer-arithmetic which will
trigger a -Werror failure. Addition and subtraction from a null pointer
is undefined behaviour and could be optimized into anything.
Furthermore, using the difference between two pointers and casting the
result back to a pointer is not portable since the size of ptrdiff_t
does not necessary have to be the same as size of void* (this happens
e.g. on CHERI). Using intptr_t instead fixes this portability issue and
the compiler warning.
Submitted by; Alexander Richardson
Obtained from: CheriBSD
Differential Revision: https://reviews.freebsd.org/D12928
MFC after: 3 days
From binutils commits 5a4b0ccc20ba30caef53b01bee2c0aaa5b855339 and
7e1e19887abd24aeb15066b141cdff5541e0ec8e, made available under GPLv2
by Nick Clifton.
PR: 198824
MFC after: 1 week
Security: CVE-2014-8501
Security: CVE-2014-8502
From binutils commit 0102ea8cec5fc509bba6c91df61b7ce23a799d32, made
available under GPLv2 by Nick Clifton.
PR: 198824
MFC after: 1 week
Security: CVE-2014-8503
This fixes clang-built binaries on a gcc powerpc64 world. Gets us one step
closer to a clang-built world. The same change was made in later upstream
binutils.
Submitted by: rdivacky
MFC after: 2 weeks
error: implicit conversion from 'bfd_vma' (aka 'unsigned long long')
to 'int' changes value from 18446744073709551615 to -1
return BFD_ALIGN (ret, 16);
~~~~~~ ^~~~~~~~~~~~~~~~~~~
note: expanded from macro 'BFD_ALIGN'
: ~ (bfd_vma) 0)
^~~~~~~~~~~~~
Sponsored by: The FreeBSD Foundation
This is no-op and only for reference: the S/390 port seems to be elusive
in the BSDs so it is convenient to keep some trace from past efforts.
It is likely newer attempts will focus on a newer toolchain using clang
instead.
Obtained from: Perforce depot/projects/s390
Initialize l_sec_contents to make sure that free(l_sec_contents) is called
on valid pointers.
Obtained from: OpenBSD (partial CVS rev 1.18)
MFC after: 5 days
Summary:
The Freescale e500v2 PowerPC core does not use a standard FPU.
Instead, it uses a Signal Processing Engine (SPE)--a DSP-style vector processor
unit, which doubles as a FPU. The PowerPC SPE ABI is incompatible with the
stock powerpc ABI, so a new MACHINE_ARCH was created to deal with this.
Additionaly, the SPE opcodes overlap with Altivec, so these are mutually
exclusive. Taking advantage of this fact, a new file, powerpc/booke/spe.c, was
created with the same function set as in powerpc/powerpc/altivec.c, so it
becomes effectively a drop-in replacement. setjmp/longjmp were modified to save
the upper 32-bits of the now-64-bit GPRs (upper 32-bits are only accessible by
the SPE).
Note: This does _not_ support the SPE in the e500v1, as the e500v1 SPE does not
support double-precision floating point.
Also, without a new MACHINE_ARCH it would be impossible to provide binary
packages which utilize the SPE.
Additionally, no work has been done to support ports, work is needed for this.
This also means no newer gcc can yet be used. However, gcc's powerpc support
has been refactored which would make adding a powerpcspe-freebsd target very
easy.
Test Plan:
This was lightly tested on a RouterBoard RB800 and an AmigaOne A1222
(P1022-based) board, compiled against the new ABI. Base system utilities
(/bin/sh, /bin/ls, etc) still function appropriately, the system is able to boot
multiuser.
Reviewed By: bdrewery, imp
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D5683
The partition_name field is an array, so can never be NULL itself. Check only
the first byte instead.
This was found when test building with clang, but I'm not sure how it passes
gcc's warnings either.
"invalid string offset 65521 >= 27261 for section `.strtab'". for object
files produced by recent versions of clang.
In BFD's elf_create_symbuf() function, the size of the symbol buffer
('ssymbuf') is not calculated correctly, and the initial value for the
'ssym' variable is off by one, since 'ssymbuf' has shndx_count + 1
members.
MFC after: 1 week
When the armv6 support was imported from a project branch, this complex
conditional logic and related #define'd values came along, but it's really
not clear what the intent of it all was. The effect, however, was that
OSABI was always set to zero, which is "UNIX System V ABI". Having the wrong
value there causes pkg(8) to avoid looking inside arm elf binaries to
determine shared-lib required/provides info for packaging.
entries. This fixes the segfaults in arm userland code compiled with
-march= or -mcpu= values that allow the compiler to generate movw/movt
sequences to load 32-bit constants.
however it will fail to output them if the type is not set correctly. This
can happen when it finds an attribute it hasn't seen before, for example
when building shared objects it will use the attributes from crti.o, hwever
this file has no attributes set.
Differential Revision: https://reviews.freebsd.org/D2413
Reviewed by: imp
to include the Unaligned Access and Floating-point Half-precision
attributes. the former marks ELF objects that may access ARMv6 style
unaligned data, the latter that the binary uses the VFPv3/Advanced SIMD
half-precision extension.
These may be emmitted by clang so it's best to print a warning when the
linker hits one of them.
Differential Revision: http://reviews.freebsd.org/D2194
Submitted by: Michal Meloun <meloun@miracle.cz>
MFC after: 1 week
bfd_dwarf2_find_line() calls find_line() with NULL functionname_ptr,
which resulted in a crash on certain ELF objects.
This change was implemented independently from upstream binutils, but
I have checked that the crash does not happen there.
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Summary:
LLVM/Clang generates relocations that our binutils doesn't understand, but newer
binutils does. I got permission from the author of a series of patches to
relicense them as GPLv2 for use in FreeBSD. The upstream git hashes are:
ac2df442ac7901f00af15b272fc48b594b433713
2b95367962dc14f69d3c338c4d54195266e2e169
102890f04c44b64cf5cef4588267dd9f24086ac7
b7fcf6f6bb53b5027e111107f5416769cb9a5798
1d483afedd5a628dc84fb58d1d570f79fdfbfa7b
90aecf7a80c1cefeb45fc10a6cd02c8338e34b4c
3a71aa26df2a372a58e9c11ef9ba51fd0e83320a
727fc41e077139570ea8b8ddfd6c546b2a55627c
With the import of clang 3.5, and a few backported patches, we should be able to
move powerpc and powerpc64 to clang-as-cc soon.
Test Plan: Passes make tinderbox, so no regressions. Binaries built with clang
run on powerpc64.
Reviewers: #committers, dim
Reviewed By: dim
Differential Revision: https://reviews.freebsd.org/D1297
Obtained from: Alan Modra, upstream binutils-gdb git
MFC after: 3 weeks
Relnotes: yes
The powerpc support was the only supported architecture not prepending the elf format name
with "-freebsd" in base this change makes it consistent with other architectures.
On newer version of binutils the powerpc format is also prepended with "-freebsd".
Also modify the kernel ldscripts in that regards.
As a result it is now possible cross build the kernel on powerpc using newer binutils
Differential Revision: https://reviews.freebsd.org/D926
Differential Revision: https://reviews.freebsd.org/D928
This targets the existing ARMv6 and ARMv7 SoCs that contain a VFP unit.
This is an optional coprocessors may not be present in all devices, however
it appears to be in all current SoCs we support.
armv6hf targets the VFP variant of the ARM EABI and our copy of gcc is too
old to support this. Because of this there are a number of WITH/WITHOUT
options that are unsupported and must be left as the default value. The
options and their required value are:
* WITH_ARM_EABI
* WITHOUT_GCC
* WITHOUT_GNUCXX
In addition, without an external toolchain, the following need to be left
as their default:
* WITH_CLANG
* WITH_CLANG_IS_CC
As there is a different method of passing float and double values to
functions the ABI is incompatible with existing armv6 binaries. To use
this a full rebuild of world is required. Because no floating point values
are passed into the kernel an armv6 kernel with VFP enabled will work with
an armv6hf userland and vice versa.
On MIPS .dynamic is read-only and so a special section .rld_map is used
to store the pointer to the rtld information for debuggers. This
section had a hard coded size of 4 bytes which is not correct for
mips64. (Note that FreeBSD's rtld does not yet populate .rld_map.)
Sponsored by: DARPA, AFRL
Approved by: re (delphij)
linking of a shared library, leading to corrupt indexes in the dynamic
symbol table. This should fix the multimedia/ffmpegthumbnailer port.
Approved by: re (kib)
Reported by: swills
MFC after: 2 weeks
DW_FORM_flag_present dwarf attribute, so they do not print errors or
warnings on files that contain it. (This attribute can be emitted by
newer versions of clang and gcc.)
MFC after: 1 week
should never do so. This can cause global constructors and destructors
to not be executed at run-time, resulting in crashes and other strange
behaviour.
Reported by: rene
MFC after: 1 week
r238211:
Support TARGET_ARCH=armv6 and TARGET_ARCH=armv6eb
This adds a new TARGET_ARCH for building on ARM
processors that support the ARMv6K multiprocessor
extensions. In particular, these processors have
better support for TLS and mutex operations.
This mostly touches a lot of Makefiles to extend
existing patterns for inferring CPUARCH from ARCH.
It also configures:
* GCC to default to arm1176jz-s
* GCC to predefine __FreeBSD_ARCH_armv6__
* gas to default to ARM_ARCH_V6K
* uname -p to return 'armv6'
* make so that MACHINE_ARCH defaults to 'armv6'
It also changes a number of headers to use
the compiler __ARM_ARCH_XXX__ macros to configure
processor-specific support routines.
Submitted by: Tim Kientzle <kientzle@freebsd.org>
* elf64-sparc.c (sparc64_elf_relocate_section): Adjust addend of
dynamic relocs against section symbols for the output section vma.
However, with the addition of TLS support in the upstream rev. 1.104
this fix was essentially reverted. After factoring out the common parts
of elf32-sparc.c and elf64-sparc.c a comment was added to elfxx-sparc.c
in the upstream rev. 1.27 as part of unrelated changes, saying that the
fix from elf64-sparc.c rev. 1.61 indeed should be implemented, but given
that some unspecified OS has a broken ld.so expecting broken relocations
deliberately is omitted.
As the current behavior actually violates the SPARC ABI, FreeBSD never
had such a broken ld.so and this is actually causing problems with at
least kernel modules linked with binutils 2.17.50 committed in r218822
without the workaround committed in r219340 in place, re-implement the
above fix in a way so that is only applied if the output format is
ELFOSABI_FREEBSD. In the upstream version it probably would make sense
to invert this check and only skip adjusting the addend for the OS with
the broken ld.so, once it's determine which one that is.
Approved by: dim
x86 CPU support, better support for powerpc64, some new directives, and
many other things. Bump __FreeBSD_version, and add a note to UPDATING.
Thanks to the many people that have helped to test this.
Obtained from: projects/binutils-2.17
it should also be MI. The problem here arises when ld ends up linking a
link-once section with relocations against sections that point back to it
that are as yet unresolved. Instead of piecemeal finding sections we
think are potentially subject to this issue, just defer processing for
sections that have yet to be relocated instead of immediately bailing.
thread specific informations.
In order to do that, and in order to avoid KBI breakage with existing
infrastructure the following semantic is implemented:
- For live programs, a new member to the PT_LWPINFO is added (pl_tdname)
- For cores, a new ELF note is added (NT_THRMISC) that can be used for
storing thread specific, miscellaneous, informations. Right now it is
just popluated with a thread name.
GDB, then, retrieves the correct informations from the corefile via the
BFD interface, as it groks the ELF notes and create appropriate
pseudo-sections.
Sponsored by: Sandvine Incorporated
Tested by: gianni
Discussed with: dim, kan, kib
MFC after: 2 weeks
into it. Prior to this commit the .gnu_debuglink section can have up
to 3 bytes of uninitialized garbage; as a result, .ko files could
change vary between builds.
Approved by: dim
MFC after: 7 days
