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the bit is reserved anyway for ABI-compat reasons; this documents it
and makes it so we can have posix_spawnattr_setflags check for flag
validity without hard-coding an anonymous bit value.
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this functionality has been adopted for inclusion in the next issue of
POSIX as the result of Austin Group issue #1044.
based on patch by Daurnimator.
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export tcp data delivery rate in tcp_info struct.
see linux commit eb8329e0a04db0061f714f033b4454326ba147f4
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for handling file locking on overlayfs.
see linux commit c568d68341be7030f5647def68851e469b21ca11
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this has been slated for removal for a long time. there is
fundamentally no way to implement stdarg without compiler assistance;
any attempt to do so has serious undefined behavior; its working
depends not just (as a common misconception goes) on ABI, but also on
assumptions about compiler code generation internal to a translation
unit, which is not subject to external ABI constraints.
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alpha and s390x gratuitously use 64-bit entries (wasting 2x space and
cache utilization) despite the values always being 32-bit.
based on patch by Bobby Bingham, with changes suggested by Alexander
Monakov to use the public Elf_Symndx type from link.h (and make it
properly variable by arch) rather than adding new internal
infrastructure for handling the type.
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based on patch by Timo Teräs:
While generally this is a bad API, it is the only existing API to
affect c++ (std::thread) and c11 (thrd_create) thread stack size.
This patch allows applications only to increate stack and guard
page sizes.
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the linux kernel uapi headers provide their own definitions of the
structures from netinet/in.h, resulting in errors when a program
includes both the standard libc header and one or more of the
networking-related kernel headers that pull in the kernel definitions.
as before, we do not attempt to support the case where kernel headers
are included before the libc ones, since the kernel definitions may
have subtly incorrect types, namespace violations, etc. however, we
can easily support the inclusion of the kernel headers after the libc
ones, since the kernel headers provide a public interface for
suppressing their definitions. this patch adds the necessary macro
definitions for such suppression.
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the value 19991006 for __RES implies availability of res_ninit and
related functions that take a resolver state argument; these are not
supported since our resolver is stateless. instead claim support for
just the older API by defining __RES to 19960801.
based on patch by Dmitrij D. Czarkoff.
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this header is XSI-shaded itself and thus does not need to limit
specific content to _XOPEN_SOURCE.
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reported and changes suggested by Daniel Sabogal.
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inclusion of these names was unintentional and in most cases is a
namespace violation. Daniel Sabogal tracked down and reported these.
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ETH_P_HSR (IEC 62439-3 HSRv1) added in
linux 4.7 commit ee1c27977284907d40f7f72c2d078d709f15811f
ETH_P_TSN (IEEE 1722) added in
linux 4.3 commit 1ab1e895492d8084dfc1c854efacde219e56b8c1
this constant breaks the ascending order to match the kernel header
ETH_P_XDSA (Multiplexed DSA protocol) added in
linux 3.18 commit 3e8a72d1dae374cf6fc1dba97cec663585845ff9
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ARPHRD_6LOWPAN (IPv6 over LoWPAN) added in
linux 3.14 commit 0abc652c796dab74d34d60473ec5594cd21620be
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the _CS_V6_ENV and _CS_V7_ENV constants are required to be available for use
with confstr. glibc defines these constants with values 1148 and 1149,
respectively.
the only missing (and required) confstr constants are
_CS_POSIX_V7_THREADS_CFLAGS and _CS_POSIX_V7_THREADS_LDFLAGS which remain
unavailable in glibc.
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the thread name is displayed by gdb's "info threads".
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add union field that is used in the kernel for SIT/GRE tunneling ICMPv4
messages. see linux commit 20e1954fe238dbe5f8d3a979e593fe352bd703cf
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another kernel internal state exposure for checkpoint-restore.
see linux commit b1ed4c4fa9a5ccf325184fd90edc50978ef6e33a
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aarch64, arm, mips, mips64, mipsn32, powerpc, powerpc64 and sh have
cpu feature bits defined in linux for AT_HWCAP auxv entry, so expose
those in sys/auxv.h
it seems the mips hwcaps were never exposed to userspace neither
by linux nor by glibc, but that's most likely an oversight.
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sync with gabi: http://www.sco.com/developers/gabi/latest/ch4.eheader.html
EM_BPF is new in linux v4.8 and officially assigned:
https://lists.iovisor.org/pipermail/iovisor-dev/2016-June/000266.html
added related relocs too.
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see linux commit 6389eaa7fa9c3ee6c7d39f6087b86660d17236ac
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since cpu sets can be dynamically allocated and have variable size,
accessing their contents via ->__bits is not valid; performing pointer
arithmetic outside the range of the size of the declared __bits array
results in undefined beahavior. instead, only use cpu_set_t for
fixed-size cpu set objects (instantiated by the caller) and as an
abstract pointer type for dynamically allocated ones. perform all
accesses simply by casting the abstract pointer type cpuset_t * back
to unsigned long *.
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these functions had been implemented, but prototypes were not made available
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glibc, freebsd, and openbsd use character pointers (caddr_t) for
these fields. only linux uses void pointer for the ifru_data type.
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this reverts commit 2c1f8fd5da3306fd7c8a2267467e44eb61f12dd4. without
the _Noreturn attribute, the compiler cannot use asserts to perform
reachability/range analysis. this leads to missed optimizations and
spurious warnings.
the original backtrace problem that prompted the removal of _Noreturn
was not clearly documented at the time, but it seems to happen only
when libc was built without -g, which also breaks many other
backtracing cases.
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O_FSYNC was never defined and is legacy/wrong, nothing seems to use it.
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only matters if swapcontext is used in a signal handler running on an
altstack, new in linux commit 2a74213838104a41588d86fd5e8d344972891ace
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for GPRS tunneling protocol, new in linux commit
459aa660eb1d8ce67080da1983bb81d716aa5a69
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macros for qualcom ip router protocol, new in linux commit
bdabad3e363d825ddf9679dd431cca0b2c30f881
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modern compilers (for gcc, versions 4.8 and later) automatically
pre-include <stdc-predef.h> to obtain the values of certain predefined
macros specified by ISO C but which reflect properties of the library
implementation, not just the compiler. provide values indicating that
wchar_t is Unicode-encoded and that Annex F (IEEE floating point) is
supported unless the compiler indicates otherwise.
based on patch by Masanori Ogino.
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commit befa5866ee30d09c0c96e88af2eabff5911342ea performed this change
for struct definitions that did not also involve typedef, but omitted
the latter.
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last time elf.h was thoroughly updated sh was not yet supported
so these processor specific e_flags were missing.
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new regset in linux v3.18 for ptrace.
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see
https://sourceware.org/ml/libc-alpha/2016-01/msg00822.html
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marks different RLD_MAP for debugging PIE binaries.
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following
http://www.sco.com/developers/gabi/latest/ch4.sheader.html
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see
https://sourceware.org/ml/libc-alpha/2015-03/msg00580.html
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following
https://sourceware.org/ml/libc-alpha/2014-05/msg00332.html
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add ilp32 related relocs and alternative names for a few macros following
https://sourceware.org/ml/libc-alpha/2014-11/msg00455.html
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see
https://sourceware.org/ml/libc-alpha/2013-11/msg00315.html
https://sourceware.org/ml/libc-alpha/2013-11/msg00314.html
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following the corresponding binutils and glibc changes
https://sourceware.org/ml/binutils/2013-10/msg00372.html
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it was changed to EM_OR1K in 200d15479c0bc48471ee7b8e538ce33af990f82e
as that was meant to be the official name, but glibc and the latest
gabi spec still uses the EM_OPENRISC name:
http://www.sco.com/developers/gabi/latest/ch4.eheader.html
binutils defines both macros so we should do the same for backward
compatibility.
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placing the opening brace on the same line as the struct keyword/tag
is the style I prefer and seems to be the prevailing practice in more
recent additions.
these changes were generated by the command:
find include/ arch/*/bits -name '*.h' \
-exec sed -i '/^struct [^;{]*$/{N;s/\n/ /;}' {} +
and subsequently checked by hand to ensure that the regex did not pick
up any false positives.
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