Guillem Jover [Thu, 13 Jun 2019 21:36:09 +0000 (23:36 +0200)]
man: Add doc-str-Lb-libbsd aliases for str-Lb-libbsd
groff(1) has changed the internal layout for the .Lb doc strings, but to
preserve backwards compatibility we cannot simply rename them, we need
to create new aliases so that these will work with old and new macros.
Aaron Dierking [Thu, 14 Jun 2018 18:38:32 +0000 (11:38 -0700)]
build: Detect Windows/MinGW at configure time
Extend the host OS checks to define an OS_WINDOWS automake conditional if
the host is MinGW-like. This will be useful for future Windows-specific
build tweaks.
[guillem@hadrons.org:
- Rename WINDOWS conditional to OS_WINDOWS. ]
Guillem Jover [Tue, 6 Aug 2019 17:14:29 +0000 (19:14 +0200)]
build: Support platforms without symbol versioning
The .symver directive is ELF-specific. On non-ELF platforms, work around
this with __attribute__((__alias__)) for the default symbol, and ignore
the variant versioned symbols.
Guillem Jover [Tue, 6 Aug 2019 21:16:42 +0000 (23:16 +0200)]
build: Use __register_atfork() only if really available
This is a glibc-specific symbol that has no public declaration. But is
being used by the OpenBSD and this implementation as a hack to avoid
having to link against the pthread library. This interface is at least
included in LSB 5.0 [L], and using pthread_atfork() is otherwise
problematic anyway [P].
One problem is that we were using it whenever __GLIBC__ is defined,
which is supposed to be defined only on an actual glibc, but uClibc
defines that macro, but it does not provide the symbol on its noMMU
variant.
We add a new configure check that will try to link a program that uses
that symbol to make sure it is present.
Aaron Dierking [Thu, 14 Jun 2018 18:38:31 +0000 (11:38 -0700)]
Correct Clang feature detection
Clang's __GNUC__ and __GNUC_MINOR__ definitions are not reliable and may
not be defined at all when targeting the MSVC ABI. Use feature-checking
macros when possible or check for __clang__.
[guillem@hadrons.org: Update for __ protected keyword change. ]
Guillem Jover [Wed, 6 Jun 2018 03:41:34 +0000 (05:41 +0200)]
Fix vis family of functions to not leak
The code uses an internal helper function to avoid code repetition. But
to get there, the function takes a pointer to a pointer, so that the few
functions that require returning an allocated buffer can get hold of it
this way.
The problem is that the user might pass a NULL pointer and trigger an
internal allocation even if the functions are not expected to do so.
Add a new internal helper for non-allocations, that will assert that
condition, and make any other function that requires this behavior call
this one instead.
Guillem Jover [Thu, 31 May 2018 01:34:07 +0000 (03:34 +0200)]
build: Fix gitlab CI configuration
Run «apt install» in non-interactive mode, and do not install
Recommends. Replace build-essential, which is rather fat, with gcc
and make. Execute autogen instead of autoreconf directly.
Guillem Jover [Tue, 22 May 2018 11:50:44 +0000 (13:50 +0200)]
Fix strnvis() and strnunvis() NetBSD ABI break
The NetBSD implementations have different prototypes to the ones coming
from OpenBSD, which will break builds, and have caused segfaults at
run-time. We provide now both interfaces with different prototypes as
different version nodes allow selecting them at compile-time, defaulting
for now to the OpenBSD one to avoid build-time breakage, while emitting
a compile-time warning. Later on, in 0.10.0, we will be switching the
compile-time default to the NetBSD version.
Guillem Jover [Mon, 21 May 2018 20:41:23 +0000 (22:41 +0200)]
Fix COPYING file format
We cannot refer to a License short-name if that is not on its own
License paragraph. Split several other common License fields into
their own paragraphs to avoid this problem in the future.
Guillem Jover [Sun, 20 May 2018 17:18:18 +0000 (19:18 +0200)]
Update pidfile module from FreeBSD
Use EINVAL instead of EDOOFUS. Add a missing synopsis for
pidfile_fileno() in the man page. Move the definition of struct pidfh
from libutil.h into pidfile.c following upstream change.
Guillem Jover [Mon, 14 May 2018 22:41:26 +0000 (00:41 +0200)]
Update getentropy() code from OpenBSD
Includes changes to handle the Linux syscall blocking when there is not
enough entropy during boot, by switching it to non-blocking mode and
falling back to the alternative implementations. Man page URL reference
fixes. Build fixes for Mac OS X.
uClibc defines EM_OR1K instead of EM_OPENRISC for the OpenRISC ELF
e_machine ID. Use EM_OR1K when EM_OPENRISC is not defined.
This fixes the following build failure:
In file included from nlist.c:44:0:
nlist.c: In function ‘__elf_is_okay__’:
local-elf.h:224:23: error: ‘EM_OPENRISC’ undeclared (first use in this function)
#define ELF_TARG_MACH EM_OPENRISC
^
nlist.c:77:26: note: in expansion of macro ‘ELF_TARG_MACH’
if (ehdr->e_machine == ELF_TARG_MACH &&
^
Guillem Jover [Tue, 6 Mar 2018 00:39:45 +0000 (01:39 +0100)]
Fix function declaration protection for glibc already providing them
On non-glibc based systems we cannot unconditionally use the
__GLIBC_PREREQ macro as it gets expanded before evaluation. Instead,
if it is undefined, define it to 0.
We should also always declare these functions on non-glibc based
systems. And on systems with a new enough glibc, which provides these
functions, we should still provide the declarations if _GNU_SOURCE
is *not* defined.
Guillem Jover [Tue, 6 Mar 2018 00:41:35 +0000 (01:41 +0100)]
Handle systems missing <sys/cdefs.h>
This is a non-portable header, and we cannot expect it to be provided by
the system libc (e.g. musl). We just need and rely on declaration that
we have defined ourselves in our own <bsd/sys/cdefs.h>. So we switch to
only ever assume that.
Handle several functions now being provided by glibc
We mention that these are now superseded by the glibc implementations,
make the headers cope with already declared functions on glibc-based
systems, and document this in the man pages.
Fix handling of non-contiguous argv + envp in setproctitle()
The two arrays might not reference contiguous memory, and assuming they
are does break at least now on GNU/Hurd, which contains an unmapped
memory block between the memory used by the two arrays.
Just check that each element is strictly after the previous one, so that
we know there are no unmapped memory blocks inbetween.
Guillem Jover [Sat, 24 Jun 2017 23:51:30 +0000 (01:51 +0200)]
test: Fix nlist() unit test on IA64 and PowerPC 64-bit ELFv1
At least on IA64 and PowerPC 64-bit ELFv1, the functions are stored in
the .text sections but they are accessed through a function descriptor
stored in a data section, for example for PowerPC 64-bit ELFv1 that
section is called .opd.
We should take this into account when checking the n_type for the
functions we have requested information from nlist().
James Cowgill [Mon, 19 Jun 2017 19:38:40 +0000 (21:38 +0200)]
Fix ELF definitions for MIPS in local-elf.h
Add a check for _MIPS_SIM inside the __mips__ #elif to detect mips64el
and use ELFCLASS64 in that case. Note that we can't use defined(__mips64)
here because that is also defined when the n32 ABI is in use, which uses
ELFCLASS32.
James Cowgill [Mon, 19 Jun 2017 19:37:14 +0000 (21:37 +0200)]
Fix ELF definitions for PowerPC in local-elf.h
* ppc64el defines both __powerpc__ and __powerpc64__ but since the
__powerpc64__ #elif is below the __powerpc__ one, it will never be hit.
* Both assumed that powerpc* was big-endian.
Guillem Jover [Tue, 13 Jun 2017 23:49:25 +0000 (01:49 +0200)]
Fix broken mmap() usage in nlist() by switching to pread()
The offset is not page aligned, which makes mmap() return EINVAL on
Linux. Switch to use pread() which handles unaligned offset and non-page
sized reads, and because we are already loading parts of the executable
by read() calls, so there's not much point in using mmap() anyway.
Guillem Jover [Mon, 5 Jun 2017 03:30:27 +0000 (05:30 +0200)]
Remove a.out support from nlist()
Some libc libraries do not have an <a.out.h> header. And a.out as an
executable format is very much obsolete on pretty much all currently
supported systems, even if they might still support loading such
objects.
projects / thirdparty / libbsd.git / log
