Rich Felker [Sun, 3 Jul 2016 20:19:28 +0000 (16:19 -0400)]
make brace placement in public header typedef'd structs consistent
commit
befa5866ee30d09c0c96e88af2eabff5911342ea performed this change
for struct definitions that did not also involve typedef, but omitted
the latter.
Szabolcs Nagy [Wed, 20 Apr 2016 11:20:50 +0000 (13:20 +0200)]
add EF_SH_ sh specific macros to elf.h
last time elf.h was thoroughly updated sh was not yet supported
so these processor specific e_flags were missing.
Szabolcs Nagy [Wed, 20 Apr 2016 11:20:36 +0000 (13:20 +0200)]
add NT_ARM_SYSTEM_CALL to elf.h
new regset in linux v3.18 for ptrace.
Szabolcs Nagy [Wed, 20 Apr 2016 11:19:45 +0000 (13:19 +0200)]
add missing x86 relocs to elf.h
see
https://sourceware.org/ml/libc-alpha/2016-01/msg00822.html
Szabolcs Nagy [Wed, 20 Apr 2016 11:19:27 +0000 (13:19 +0200)]
add DT_MIPS_RLD_MAP_REL to elf.h
marks different RLD_MAP for debugging PIE binaries.
Szabolcs Nagy [Wed, 20 Apr 2016 11:19:08 +0000 (13:19 +0200)]
add SHF_COMPRESSED section flag to elf.h
following
http://www.sco.com/developers/gabi/latest/ch4.sheader.html
Szabolcs Nagy [Wed, 20 Apr 2016 11:17:54 +0000 (13:17 +0200)]
add powerpc tls optimization related definitions to elf.h
see
https://sourceware.org/ml/libc-alpha/2015-03/msg00580.html
Szabolcs Nagy [Wed, 20 Apr 2016 11:17:31 +0000 (13:17 +0200)]
add nios2 definitions to elf.h
Szabolcs Nagy [Wed, 20 Apr 2016 11:17:11 +0000 (13:17 +0200)]
update elf.h with mips abi flags support
following
https://sourceware.org/ml/libc-alpha/2014-05/msg00332.html
Szabolcs Nagy [Sun, 3 Jul 2016 20:13:44 +0000 (22:13 +0200)]
update elf.h with new aarch64 relocs
add ilp32 related relocs and alternative names for a few macros following
https://sourceware.org/ml/libc-alpha/2014-11/msg00455.html
Szabolcs Nagy [Wed, 20 Apr 2016 11:15:16 +0000 (13:15 +0200)]
update elf.h with powerpc64 elfv2 abi related macros
see
https://sourceware.org/ml/libc-alpha/2013-11/msg00315.html
https://sourceware.org/ml/libc-alpha/2013-11/msg00314.html
Szabolcs Nagy [Wed, 20 Apr 2016 11:14:53 +0000 (13:14 +0200)]
add new powerpc64 relocations to elf.h
following the corresponding binutils and glibc changes
https://sourceware.org/ml/binutils/2013-10/msg00372.html
Szabolcs Nagy [Wed, 20 Apr 2016 11:14:13 +0000 (13:14 +0200)]
add EM_OPENRISC again to elf.h
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.
Rich Felker [Sun, 3 Jul 2016 18:40:11 +0000 (14:40 -0400)]
make brace placement in public header struct definitions consistent
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.
Rich Felker [Sun, 3 Jul 2016 18:38:53 +0000 (14:38 -0400)]
fix misplaced indention in sys/procfs.h
Rich Felker [Sun, 3 Jul 2016 18:12:09 +0000 (14:12 -0400)]
format mips bits/termios.h consistently mips64 and n32 versions
with this change, all three files are identical.
Szabolcs Nagy [Sun, 3 Jul 2016 15:09:51 +0000 (17:09 +0200)]
fix CBAUDEX in powerpc termios.h
it seems it was a typo.
Szabolcs Nagy [Sun, 3 Jul 2016 15:09:29 +0000 (17:09 +0200)]
fix TCS* definitions in mips termios.h
these were incorrectly using the generic definitions.
Szabolcs Nagy [Sun, 3 Jul 2016 15:08:54 +0000 (17:08 +0200)]
fix mips termios.h macro exposure/namespace issues
same changes to the defined macros as in powerpc and generic bits.
Szabolcs Nagy [Sun, 3 Jul 2016 15:08:24 +0000 (17:08 +0200)]
fix powerpc termios.h macro exposure/namespace issues
same changes as in the generic header.
and BOTHER and IBSHIFT were removed (present in linux uapi but not
in glibc) and TIOCSER_TEMT was added (present in glibc).
Szabolcs Nagy [Sun, 3 Jul 2016 15:07:56 +0000 (17:07 +0200)]
fix generic termios.h macro exposure/namespace issues
add EXTA, EXTB, CIBAUD, CMSPAR, XCASE macros and hide them as well as
CBAUD, ECHOCTL, ECHOPRT, ECHOKE, FLUSHO, PENDIN in standard mode.
the new macros are both in glibc termios.h and in linux asm/termbits.h,
the later also contains IBSHIFT and BOTHER, those were not added.
these are not standard macros, but some of them are in the reserved
namespace so could be exposed, the ones which are not reserved are
CIBAUD, CMSPAR and XCASE (which was removed in issue 6), the rest
got hidden to be consistent with glibc.
Rich Felker [Sun, 3 Jul 2016 19:01:04 +0000 (15:01 -0400)]
define appropriate feature test macros to get CBAUD from termios.h
Szabolcs Nagy [Sun, 3 Jul 2016 15:07:30 +0000 (17:07 +0200)]
fix FIOQSIZE in arm ioctl.h
arm ioctl.h is the same as the generic one except this macro,
so a workaround solution is used to avoid another ioctl.h copy.
Szabolcs Nagy [Sun, 3 Jul 2016 15:06:36 +0000 (17:06 +0200)]
remove termios2 related ioctls from sh ioctl.h
musl does not define these on other targets either.
Szabolcs Nagy [Sun, 3 Jul 2016 15:06:03 +0000 (17:06 +0200)]
fix TIOCMSET in mips ioctl.h
it seems it was a typo.
Szabolcs Nagy [Sun, 3 Jul 2016 15:05:36 +0000 (17:05 +0200)]
fix mips, mips64, mipsn32 TIOCM_* macros in ioctl.h
TIOCM_ macros were wrongly using the asm-generic/termios.h definitions
instead of the mips specific ones from asm/termios.h
Szabolcs Nagy [Sun, 3 Jul 2016 15:05:08 +0000 (17:05 +0200)]
remove mips and powerpc ioctls that are missing from linux uapi
mips and powerpc use their own asm/ioctls.h, not the asm-generic/ioctls.h
and they lack termiox macros that are available on other targets.
see kernel commit
1d65b4a088de407e99714fdc27862449db04fb5c
Szabolcs Nagy [Sun, 3 Jul 2016 15:04:32 +0000 (17:04 +0200)]
add missing TIOC* macros to ioctl.h
these are defined in linux asm/ioctls.h.
(powerpc64 and powerpc bits/ioctl.h are now identical)
Szabolcs Nagy [Sun, 3 Jul 2016 15:03:56 +0000 (17:03 +0200)]
add missing SIOCSIFNAME from linux/sockios.h to ioctl.h
glibc ioctl.h has it too.
Szabolcs Nagy [Sun, 3 Jul 2016 15:03:19 +0000 (17:03 +0200)]
remove ioctl macros that were removed from linux uapi
TIOCTTYGSTRUCT, TIOCGHAYESESP, TIOCSHAYESESP and TIOCM_MODEM_BITS
were removed from the linux uapi and not present in glibc ioctl.h
Szabolcs Nagy [Sun, 3 Jul 2016 15:02:23 +0000 (17:02 +0200)]
use the generic ioctl.h for x86_64, x32 and aarch64
they were slightly different in musl, but should be the same:
the linux uapi and glibc headers are not different.
Rich Felker [Sun, 3 Jul 2016 14:49:52 +0000 (10:49 -0400)]
add consistent reserved fields in mips64/n32 termios structures
the (unused) speed fields were omitted when these ports were first
added (within this release cycle, so not present in any release yet)
in accordance with how glibc defines the structure on mips archs.
however their omission does not match existing musl practice/intent.
glibc provides its own, mostly-unified termios structure definition
and performs translation in userspace to match the kernel structure
for the arch, but has gratuitous differences on a few archs like mips,
presumably as a result of historical mistakes. some other libcs use
the kernel definitions directly. musl essentially does that, by
matching the kernel layout in the part of the structure the kernel
will read/write, but leaves additional space at the end for
extensibility. these are nominally the (nonstandard) speed fields and
(on most archs) extra c_cc elements, but since they are not used they
could be repurposed if there's ever a need.
Rich Felker [Fri, 1 Jul 2016 17:32:35 +0000 (13:32 -0400)]
fix posix_fadvise syscall args on powerpc, unify with arm fix
commit
6d38c9cf80f47623e5e48190046673bbd0dc410b provided an
arm-specific version of posix_fadvise to address the alternate
argument order the kernel expects on arm, but neglected to address
that powerpc (32-bit) has the same issue. instead of having arch
variant files in duplicate, simply put the alternate version in the
top-level file under the control of a macro defined in syscall_arch.h.
Bobby Bingham [Sat, 7 May 2016 18:48:21 +0000 (13:48 -0500)]
pthread: implement try/timed join variants
Rich Felker [Wed, 29 Jun 2016 22:21:36 +0000 (18:21 -0400)]
fix misordered syscall arguments for posix_fadvise on arm
the arm version of the syscall has a custom argument ordering to avoid
needing a 7-argument syscall due to 64-bit argument alignment.
Rich Felker [Wed, 29 Jun 2016 21:45:40 +0000 (17:45 -0400)]
in posix_fadvise, don't bypass __syscall macro infrastructure
when commit
0b6eb2dfb2e84a8a51906e7634f3d5edc230b058 added the
parentheses around __syscall to invoke the function directly, there
was no __syscall7 in the syscall macro infrastructure, so this hack
was needed. commit
9a3bbce447403d735282586786dc436ec1ffbad4 fixed that
but failed to remove the hack.
Natanael Copa [Wed, 15 Jun 2016 18:27:46 +0000 (20:27 +0200)]
refactor name_from_dns in hostname lookup backend
loop over an address family / resource record mapping to avoid
repetitive code.
Natanael Copa [Wed, 25 May 2016 09:22:13 +0000 (11:22 +0200)]
in performing dns lookups, check result from res_mkquery
don't send a query that may be malformed.
Rich Felker [Wed, 29 Jun 2016 15:55:41 +0000 (11:55 -0400)]
add RUSAGE_THREAD (Linux extension) definition to sys/resource.h
Rich Felker [Wed, 29 Jun 2016 15:54:03 +0000 (11:54 -0400)]
fix incorrect definition of RUSAGE_CHILDREN in sys/resource.h
the kernel ABI value for RUSAGE_CHILDREN is -1, not 1. the latter is
actually interpreted as RUSAGE_THREAD, to obtain values for just the
calling thread and not the whole process.
Rich Felker [Mon, 27 Jun 2016 21:11:30 +0000 (17:11 -0400)]
fix misaligned address buffers in gethostbyname[2][_r] results
mistakenly ordering strings before addresses in the result buffer
broke the alignment that the preceding code had set up.
Rich Felker [Mon, 27 Jun 2016 19:18:13 +0000 (15:18 -0400)]
fix failure to obtain EOWNERDEAD status for process-shared robust mutexes
Linux's documentation (robust-futex-ABI.txt) claims that, when a
process dies with a futex on the robust list, bit 30 (0x40000000) is
set to indicate the status. however, what actually happens is that
bits 0-30 are replaced with the value 0x40000000, i.e. bits 0-29
(containing the old owner tid) are cleared at the same time bit 30 is
set.
our userspace-side code for robust mutexes was written based on that
documentation, assuming that kernel would never produce a futex value
of 0x40000000, since the low (owner) bits would always be non-zero.
commit
d338b506e39b1e2c68366b12be90704c635602ce introduced this
assumption explicitly while fixing another bug in how non-recoverable
status for robust mutexes was tracked. presumably the tests conducted
at that time only checked non-process-shared robust mutexes, which are
handled in pthread_exit (which implemented the documented kernel
protocol, not the actual one) rather than by the kernel.
change pthread_exit robust list processing to match the kernel
behavior, clearing bits 0-29 while setting bit 30, and use the value
0x7fffffff instead of 0x40000000 to encode non-recoverable status. the
choice of value here is arbitrary; any value with at least one of bits
0-29 set should work just as well,
Rich Felker [Tue, 21 Jun 2016 20:33:14 +0000 (16:33 -0400)]
remove comments on copyright status from UTF-8 implementation files
despite clarifications made to the COPYRIGHT file in commit
f0a61399330bae42beeb27d6ecd05570b3382a60, there continues to be
confusion about whether the permissions granted actually apply to all
files. I am the sole author of these files and clearly intend, and
have always intended, for the grant of permission to apply to them.
Rich Felker [Thu, 9 Jun 2016 17:42:06 +0000 (13:42 -0400)]
avoid padding gaps in struct sockaddr_storage
compilers are free not to copy, or in some cases to clobber, padding
bytes in a structure. while it's an aliasing violation, and thus
undefined behavior, to copy or manipulate other sockaddr types using
sockaddr_storage, it seems likely that traditional code attempts to do
so, and the original intent of the sockaddr_storage structure was
probably to allow such usage.
in the interest of avoiding silent and potentially dangerous breakage,
ensure that there are no actual padding bytes in sockaddr_storage by
moving and adjusting the size of the __ss_padding member so that it
fits exactly.
this change also removes a silent assumption that the alignment of
long is equal to its size.
Szabolcs Nagy [Thu, 26 May 2016 20:07:32 +0000 (22:07 +0200)]
update sys/socket.h to linux v4.6
kernel connection multiplexor macros AF_KCM, PF_KCM, SOL_KCM were
added in linux commit
ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
MSG_BATCH sendmsg flag for performance optimization was added
in linux commit
f092276d85b82504e8a07498f4e9e0c51f06745c
SOL_* macros are now synced with linux socket.h which is not a uapi
header and glibc did not have the macros either, but that has changed
http://sourceware.org/ml/libc-alpha/2016-05/msg00322.html
Szabolcs Nagy [Thu, 26 May 2016 20:07:09 +0000 (22:07 +0200)]
add new tcp_info fields from linux v4.6
new fields and associated linux commit:
tcpi_notsent_bytes, tcpi_min_rtt
cd9b266095f422267bddbec88f9098b48ea548fc
tcpi_data_segs_in, tcpi_data_segs_out
a44d6eacdaf56f74fad699af7f4925a5f5ac0e7f
Szabolcs Nagy [Thu, 26 May 2016 20:06:44 +0000 (22:06 +0200)]
add CLONE_NEWCGROUP clone flag, new in linux v4.6
flag for new cgroup namespace, added in linux commit
5e2bec7c2248ae27c5b16cd97215ae05c1d39179
Szabolcs Nagy [Thu, 26 May 2016 20:06:10 +0000 (22:06 +0200)]
update siginfo struct for linux v4.6
x86 protection key faults are reported in the si_pkey field,
added in linux commit
cd0ea35ff5511cde299a61c21a95889b4a71464e
Szabolcs Nagy [Thu, 26 May 2016 20:05:45 +0000 (22:05 +0200)]
add ETH_P_MACSEC netinet/if_ether.h, new in linux v4.6
ethertype for macsec added in linux commit
dece8d2b78d19df7fe5e4e965f1f0d1a3e188d1b
Szabolcs Nagy [Thu, 26 May 2016 20:05:25 +0000 (22:05 +0200)]
add SO_CNX_ADVICE to sys/socket.h, new in linux v4.6
new socket option so application can give advice about routing
path quality of connected udp sockets, added in linux commit
a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Szabolcs Nagy [Thu, 26 May 2016 20:04:56 +0000 (22:04 +0200)]
add preadv2 and pwritev2 syscall numbers for linux v4.6
the syscalls take an additional flag argument, they were added in commit
f17d8b35452cab31a70d224964cd583fb2845449 and a RWF_HIPRI priority hint
flag was added to linux/fs.h in
97be7ebe53915af504fb491fb99f064c7cf3cb09.
the syscall is not allocated for microblaze and sh yet.
Rich Felker [Mon, 23 May 2016 22:19:11 +0000 (18:19 -0400)]
fix a64l undefined behavior on ILP32 archs, wrong results on LP64 archs
the difference of pointers is a signed type ptrdiff_t; if it is only
32-bit, left-shifting it by 30 bits produces undefined behavior. cast
the difference to an appropriate unsigned type, uint32_t, before
shifting to avoid this.
the a64l function is specified to return a signed 32-bit result in
type long. as noted in the bug report by Ed Schouten, converting
implicitly from uint32_t only produces the desired result when long is
a 32-bit type. since the computation has to be done in unsigned
arithmetic to avoid overflow, simply cast the result to int32_t.
further, POSIX leaves the behavior on invalid input unspecified but
not undefined, so we should not take the difference between the
potentially-null result of strchr and the base pointer without first
checking the result. the simplest behavior is just returning the
partial conversion already performed in this case, so do that.
Rich Felker [Sun, 22 May 2016 22:49:59 +0000 (18:49 -0400)]
fix undefined pointer arithmetic in CMSG_NXTHDR macro
previously, the only way the stopping condition could be met with
correct lengths in the headers invoked undefined behavior, adding
sizeof(struct cmsghdr) beyond the end of the cmsg buffer.
instead, compute and compare sizes rather than pointers.
Szabolcs Nagy [Sat, 21 May 2016 13:21:38 +0000 (15:21 +0200)]
fix the use of uninitialized value in regcomp
the num_submatches field of some ast nodes was not initialized in
tre_add_tag_{left,right}, but was accessed later.
this was a benign bug since the uninitialized values were never used
(these values are created during tre_add_tags and copied around during
tre_expand_ast where they are also used in computations, but nothing
in the final tnfa depends on them).
Bobby Bingham [Thu, 12 May 2016 05:34:05 +0000 (00:34 -0500)]
deduplicate __NR_* and SYS_* syscall number definitions
Bobby Bingham [Thu, 12 May 2016 04:00:02 +0000 (23:00 -0500)]
x32: eliminate __X32_SYSCALL_BIT constant
Bobby Bingham [Thu, 12 May 2016 05:30:51 +0000 (00:30 -0500)]
x32: remove arch-specific syscall remapping
These system calls are already all remapped in an arch-agnostic manner in
src/internal/syscall.h
Rich Felker [Mon, 9 May 2016 03:16:14 +0000 (23:16 -0400)]
fix spurious trailing whitespace in powerpc & powerpc64 bits/errno.h
Bobby Bingham [Sun, 1 May 2016 00:18:17 +0000 (19:18 -0500)]
add powerpc64 port
LeMay, Michael [Wed, 4 May 2016 03:29:42 +0000 (03:29 +0000)]
fix redundant processing of --build flag in configure script
The --build flag is listed in two case statement entries in configure,
which causes the second entry to be ignored. This patch removes it
from the first entry.
Signed-off-by: Michael LeMay <michael.lemay@intel.com>
Andrew Kelley [Wed, 4 May 2016 20:29:11 +0000 (13:29 -0700)]
fix incorrect protocol name and number for egp
previously if you called getprotobyname("egp") you would get
NULL because \008 is invalid octal and so the protocol id was
interpreted as 0 and name as "8egp".
Rich Felker [Fri, 29 Apr 2016 23:50:33 +0000 (19:50 -0400)]
follow standard configure behavior for cross compile prefix
the standard configure interface, which our configure script tries to
implement, identifies cross compiling (build != host) and searches for
the properly-prefixed cross tools. our script was not doing that,
forcing users to explicitly provide either CC or a CROSS_COMPILE tool
prefix, and the more common choice, just providing CC, was incomplete
because the Makefile would still invoke the native ar and ranlib
programs. this happened to work when building on ELF-based systems
with GNU binutils, but could easily fail when cross-compiling from
dissimilar systems.
like before, and like the standard configure behavior, an explicit CC
or CROSS_COMPILE variable on the command line or in the environment
overrides the automatic prefixing.
Rich Felker [Fri, 29 Apr 2016 00:41:45 +0000 (20:41 -0400)]
update COPYRIGHT file to clarify that permissions apply for all files
these changes are the outcome of a long mailing list thread that took
place March 2016, "musl licensing". among minor other issues,
prospective users were not confident that the whole-project MIT
license would grant permission for files to which the COPYRIGHT file
expressed a belief that copyright not apply, if it turned out that
these files were actually subject to copyright.
in accordance with the original intent of applying a permissive
license to the project, which was that license issues not be an
obstacle to use, the text which was causing confusion is removed. no
new claims of copyright are made, but new text is added to clarify
that the grant of permissions applies to all files, and an explicit
grant of permission to use public headers and crt files without
attribution has been made.
this patch was reviewed and approved by all substantial contributors
to the affected files: Bobby Bingham, John Spencer (rofl0r), Nicholas
J. Kain, Rich Felker, Richard Pennington, Stefan Kristiansson, and
Szabolcs Nagy.
Rich Felker [Tue, 26 Apr 2016 19:26:40 +0000 (15:26 -0400)]
fix FILE buffer underflow in ungetwc
commit
7e816a6487932cbb3cb71d94b609e50e81f4e5bf (version 1.1.11
release cycle) moved the code that performs wchar_t to multibyte
conversion across code that used the resulting length in bytes,
thereby breaking the unget buffer space check in ungetwc and
clobbering up to three bytes below the start of the buffer.
for allocated FILEs (all read-enabled FILEs except stdin), the
underflow clobbers at most the FILE-specific locale pointer. no stores
are performed through this pointer, but subsequent loads may result in
a crash or mismatching encoding rule (UTF-8 multibyte vs byte-based).
for stdin, the buffer lies in .bss and the underflow may clobber
another object. in practice, for libc.so the adjacent object seems to
be stderr's buffer, which is completely unused, but this could vary
with linking options, or when static linking.
applications which do not attempt to use more than one character of
ungetwc pushback, or which do not use ungetwc, are not affected.
Rich Felker [Mon, 25 Apr 2016 23:37:06 +0000 (19:37 -0400)]
fix thread structure/dtv-pointer corruption on powerpc
per the powerpc psabi, offset 4 of the stack at call time belongs to
the callee and is used for spilling lr (return address). in addition,
offset 0 on the stack must contain a pointer to the previous stack
frame, or a null pointer for the initial stack frame of a thread.
__clone failed to setup any stack frame on the new thread's stack,
thereby allowing the start function it called to clobber offset 4 of
the new thread's struct __pthread, which contains the dtv pointer.
add code to setup a proper stack frame and align the stack pointer to
a multiple of 16 (also an abi requirement) if it was not already
aligned.
Petr Vaněk [Sun, 17 Apr 2016 14:53:08 +0000 (14:53 +0000)]
remove dead store in res_msend
The variable nss is set to zero in following line.
Rich Felker [Mon, 18 Apr 2016 05:19:13 +0000 (05:19 +0000)]
add mips n32 port (ILP32 ABI for mips64)
based on patch submitted by Jaydeep Patil, with minor changes.
Rich Felker [Sun, 3 Apr 2016 10:42:37 +0000 (10:42 +0000)]
add support for mips and mips64 r6 isa
mips32r6 and mips64r6 are actually new isas at both the asm source and
opcode levels (pre-r6 code cannot run on r6) and thus need to be
treated as a new subarch. the following changes are made, some of
which yield code generation improvements for non-r6 targets too:
- add subarch logic in configure script and reloc.h files for dynamic
linker name.
- suppress use of .set mips2 asm directives (used to allow mips2
atomic instructions on baseline mips1 builds; the kernel has to
emulate them on mips1) except when actually needed. they cause wrong
instruction encodings on r6, and pessimize inlining on at least some
compilers.
- only hard-code sync instruction encoding on mips1.
- use "ZC" constraint instead of "m" constraint for llsc memory
operands on r6, where the ll/sc instructions no longer accept full
16-bit offsets.
- only hard-code rdhwr instruction encoding with .word on targets
(pre-r2) where it may need trap-and-emulate by the kernel.
otherwise, just use the instruction mnemonic, and allow an arbitrary
destination register to be used.
Rich Felker [Fri, 1 Apr 2016 17:36:15 +0000 (13:36 -0400)]
fix read past end of haystack buffer for short needles in memmem
the two/three/four byte memmem specializations are not prepared to
handle haystacks shorter than the needle; they unconditionally read at
least up to the needle length and subtract from the haystack length.
if the haystack is shorter, the remaining haystack length underflows
and produces an unbounded search which will eventually either crash or
find a spurious match.
the top-level memmem function attempted to avoid this case already by
checking for haystack shorter than needle, but it failed to re-check
after using memchr to remove the maximal prefix not containing the
first byte of the needle.
Rich Felker [Wed, 30 Mar 2016 01:22:52 +0000 (21:22 -0400)]
fix regression disabling use of pause instruction for x86 a_spin
commits
e24984efd5c6ac5ea8e6cb6cd914fa8435d458bc and
16b55298dc4b6a54d287d7494e04542667ef8861 inadvertently disabled the
a_spin implementations for i386, x86_64, and x32 by defining a macro
named a_pause instead of a_spin. this should not have caused any
functional regression, but it inhibited cpu relaxation while spinning
for locks.
bug reported by George Kulakowski.
Rich Felker [Tue, 29 Mar 2016 03:41:17 +0000 (23:41 -0400)]
fix undefined pointer comparison in stdio-internal __toread
the comparison f->wpos > f->buf has undefined behavior when f->wpos is
a null pointer, despite the intuition (and actual compiler behavior,
for all known compilers) being that NULL > ptr is false for all valid
pointers ptr.
the purpose of the comparison is to determine if the write buffer is
non-empty, and the idiom used elsewhere for that is comparison against
f->wbase, which is either a null pointer when not writing, or equal to
f->buf when writing. in the former case, both f->wpos and f->wbase are
null; in the latter they are both non-null and point into the same
array.
Timo Teräs [Tue, 22 Mar 2016 14:27:51 +0000 (16:27 +0200)]
fix gethostbyaddr_r to fill struct hostent.h_length as appropriate
Szabolcs Nagy [Sat, 19 Mar 2016 12:37:37 +0000 (13:37 +0100)]
add MADV_FREE madvise command from linux v4.5
allows the os to free the marked pages lazily on memory pressure.
expected to increase malloc performance.
new in linux commit
854e9ed09dedf0c19ac8640e91bcc74bc3f9e5c9
Szabolcs Nagy [Sat, 19 Mar 2016 12:37:03 +0000 (13:37 +0100)]
add EPOLLEXCLUSIVE epoll flag from linux v4.5
new flag for exclusive wakeup mode when an event source fd is attached
to multiple epoll fds but they should not all receive the events.
new in linux commit
df0108c5da561c66c333bb46bfe3c1fc65905898
Szabolcs Nagy [Sat, 19 Mar 2016 12:36:42 +0000 (13:36 +0100)]
add SO_ATTACH_REUSEPORT_[CE]BPF socket options from linux v4.5
new socket options for setting classic or extended BPF program
for sockets in a SO_REUSEPORT group. added in linux commit
538950a1b7527a0a52ccd9337e3fcd304f027f13
Szabolcs Nagy [Sat, 19 Mar 2016 12:36:09 +0000 (13:36 +0100)]
add IPV6_HDRINCL socket option from linux v4.5
new in linux commit
715f504b118998c41a2079a17e16bf5a8a114885
same as IP_HDRINCL but for SOL_IPV6 sockets.
Szabolcs Nagy [Sat, 19 Mar 2016 12:35:43 +0000 (13:35 +0100)]
add copy_file_range syscall numbers from linux v4.5
it was introduced for offloading copying between regular files
in linux commit
29732938a6289a15e907da234d6692a2ead71855
(microblaze and sh does not yet have the syscall number.)
Szabolcs Nagy [Sat, 19 Mar 2016 12:35:08 +0000 (13:35 +0100)]
mips64: add recent linux syscall numbers
add userfaultfd, membarrier and mlock2 system call numbers.
Rich Felker [Sat, 19 Mar 2016 03:46:41 +0000 (23:46 -0400)]
fix outdated pathnames in COPYRIGHT file
Szabolcs Nagy [Fri, 18 Mar 2016 00:57:52 +0000 (00:57 +0000)]
deduplicate bits/mman.h
currently five targets use the same mman.h constants and the rest
share most constants too, so move them to sys/mman.h before the
bits/mman.h include where the differences can be corrected by
redefinition of the macros.
this fixes two minor bugs: POSIX_MADV_DONTNEED was wrong on most
targets (it should be the same as MADV_DONTNEED), and sh defined
the x86-only MAP_32BIT mmap flag.
Rich Felker [Wed, 16 Mar 2016 20:35:22 +0000 (16:35 -0400)]
fix padding string formats to width in wide printf variants
the idiom fprintf(f, "%.*s", n, "") was wrongly used in vfwprintf as a
means of producing n spaces; instead it produces no output. the
correct form is fprintf(f, "%*s", n, ""), using width instead of
precision, since for %s the later is a maximum rather than a minimum.
Rich Felker [Fri, 11 Mar 2016 05:12:56 +0000 (05:12 +0000)]
correct pointer types for a_ll_p and a_sc_p primitives on mips64
these changes should not affect generated code, but they reflect that
the underlying objects operated on by a_cas_p are supposed to have
type volatile void *, not volatile long. in theory a compiler could
treat the effective type mismatch in the "m" memory operands as
undefined behavior.
Rich Felker [Fri, 11 Mar 2016 05:02:10 +0000 (00:02 -0500)]
make mips64 a_sc_p atomic primitive's asm constraints work with clang
apparently clang does not accept matching-register input and output
constraints that differ in size (32-bit vs 64-bit).
based on patch by Jaydeep Patil.
Rich Felker [Sun, 6 Mar 2016 22:11:29 +0000 (17:11 -0500)]
make configure check for unsupported (SPE) powerpc hard-float models
the SPE ABI may be compatible with soft-float, but actually making it
work requires some additional work, so for now it's best to make sure
broken builds don't happen.
Felix Fietkau [Mon, 25 Jan 2016 12:20:52 +0000 (13:20 +0100)]
add powerpc soft-float support
Some PowerPC CPUs (e.g. Freescale MPC85xx) have a completely different
instruction set for floating point operations (SPE).
Executing regular PowerPC floating point instructions results in
"Illegal instruction" errors.
Make it possible to run these devices in soft-float mode.
Alexander Monakov [Sun, 6 Mar 2016 17:22:38 +0000 (20:22 +0300)]
env: avoid leaving dangling pointers in __env_map
This is the minimal fix for __putenv leaving a pointer to freed heap
storage in __env_map array, which could later on lead to errors such
as double-free.
Rich Felker [Sun, 6 Mar 2016 17:48:58 +0000 (17:48 +0000)]
update documentation files for mips64 port
Rich Felker [Sun, 6 Mar 2016 17:41:56 +0000 (17:41 +0000)]
add mips64 port
patch by Mahesh Bodapati and Jaydeep Patil of Imagination
Technologies.
Rich Felker [Sun, 6 Mar 2016 17:25:52 +0000 (17:25 +0000)]
generalize mips-specific reloc code not to hard-code sym/type encoding
this change is made in preparation for adding the mips64 port, which
needs a 64-bit (and mips64-specific) form of the R_INFO macro, but
it's a better abstraction anyway.
based on part of the mips64 port patch by Mahesh Bodapati and Jaydeep
Patil of Imagination Technologies.
Szabolcs Nagy [Fri, 4 Mar 2016 21:23:33 +0000 (21:23 +0000)]
math: fix expf(-NAN) and exp2f(-NAN) to return -NAN instead of 0
expf(-NAN) was treated as expf(-large) which unconditionally
returns +0, so special case +-NAN.
reported by Petr Hosek.
Nathan Zadoks [Wed, 2 Mar 2016 16:26:27 +0000 (17:26 +0100)]
add sched_getcpu vDSO support
This brings the call to an actually usable speed.
Quick unscientific benchmark: 14ns : 102ns :: vDSO : syscall
Nathan Zadoks [Wed, 2 Mar 2016 16:26:26 +0000 (17:26 +0100)]
add sched_getcpu
This is a GNU extension, but a fairly minor one, for a system call that
otherwise has no libc wrapper.
Szabolcs Nagy [Mon, 29 Feb 2016 16:36:25 +0000 (16:36 +0000)]
fix ^* at the start of a complete BRE
This is a workaround to treat * as literal * at the start of a BRE.
Ideally ^ would be treated as an anchor at the start of any BRE
subexpression and similarly $ would be an anchor at the end of any
subexpression. This is not required by the standard and hard to do
with the current code, but it's the existing practice. If it is
changed, * should be treated as literal after such anchor as well.
Szabolcs Nagy [Mon, 29 Feb 2016 15:04:46 +0000 (15:04 +0000)]
fix * at the start of a BRE subexpression
commit
7eaa76fc2e7993582989d3838b1ac32dd8abac09 made * invalid at
the start of a BRE subexpression, but it should be accepted as
literal * there according to the standard.
This patch does not fix subexpressions starting with ^*.
Michael Meeuwisse [Tue, 23 Feb 2016 22:49:57 +0000 (23:49 +0100)]
explicitly include stdio.h to get EOF definition needed by wctob
Rich Felker [Wed, 2 Mar 2016 05:34:51 +0000 (00:34 -0500)]
handle non-matching address family entries in hosts file
name_from_hosts failed to account for the possibility of an address
family error from name_from_numeric, wrongly counting such a return as
success and using the uninitialized address data as part of the
results passed up to the caller.
non-matching address family entries cannot simply be ignored or
results would be inconsistent with respect to whether AF_UNSPEC or a
specific address family is queried. instead, record that a
non-matching entry was seen, and fail the lookup with EAI_NONAME of no
matching-family entries are found.
Rich Felker [Tue, 23 Feb 2016 18:04:56 +0000 (13:04 -0500)]
make aarch64 atomic_arch.h report that it defines pointer-sized ll/sc
at present this is done only for consistency, since this file defines
its own a_cas_p rather than using the new generic one from atomic.h
added in commit
225f6a6b5b7173b6655e4f5d49b5b9fea70bf3bb. these
definitions may however be useful if we ever need to add other
pointer-sized atomic operations.
Bobby Bingham [Tue, 23 Feb 2016 03:14:23 +0000 (21:14 -0600)]
allow implementing a_cas_p with pointer-sized ll/sc
No current ports do this, but it will be useful for porting to 64-bit ll/sc
architectures, such as mips64 and powerpc64.
Rich Felker [Mon, 22 Feb 2016 05:07:05 +0000 (00:07 -0500)]
release 1.1.14
Rich Felker [Fri, 19 Feb 2016 19:16:33 +0000 (14:16 -0500)]
generate list of crt files to install instead of hard-coding in makefile
this follows the principle of having the source tree layout define
build semantics. it also makes it possible for crt/$(ARCH) to define
additional installable files, which may be needed for midipix and
other future targets.