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2018-02-22elf.h: update NT_* coredump elf notes for linux v4.15Szabolcs Nagy-0/+21
NT_ARM_SVE and NT_S390_RI_CB are new in linux commits 43d4da2c45b2f5d62f8a79ff7c6f95089bb24656 and 262832bc5acda76fd8f901d39f4da1121d951222 the rest are older. musl missed NT_PRFPREG because it followed the glibc api: https://sourceware.org/bugzilla/show_bug.cgi?id=14890
2018-02-22elf.h: add PPC64_OPT_LOCALENTRYSzabolcs Nagy-0/+1
allows calling extern functions without saving r2, for details see glibc commit 0572433b5beb636de1a49ec6b4fdab830c38cdc5
2018-02-22elf.h: add AT_* auxval macros for cache geometrySzabolcs Nagy-0/+8
AT_L1I_*, AT_L1D_*, AT_L2_* and AT_L3_* were added in linux v4.11 for powerpc in commit 98a5f361b8625c6f4841d6ba013bbf0e80d08147.
2018-02-22sys/prctl.h: add new PR_SVE_* macros from linux v4.15Szabolcs Nagy-0/+6
PR_SVE_SET_VL and PR_SVE_GET_VL controls are new in linux commit 2d2123bc7c7f843aa9db87720de159a049839862 related PR_SVE_* macros were added in 7582e22038a266444eb87bc07c372592ad647439
2018-02-22aarch64: update hwcap.h for linux v4.15Szabolcs Nagy-0/+6
HWCAP_SVE is new in linux commit 43994d824e8443263dc98b151e6326bf677be52e HWCAP_SHA3, HWCAP_SM3, HWCAP_SM4, HWCAP_ASIMDDP and HWCAP_SHA512 are new in f5e035f8694c3bdddc66ea46ecda965ee6853718
2018-02-22arm: add get_tls syscall from linux v4.15Szabolcs Nagy-0/+1
for systems without tp register or kuser helper, new in linux commit 8fcd6c45f5a65621ec809b7866a3623e9a01d4ed
2018-02-22powerpc: update hwcap.h for linux v4.15Szabolcs Nagy-0/+6
PPC_FEATURE2_HTM_NO_SUSPEND is new in linux commit cba6ac4869e45cc93ac5497024d1d49576e82666 PPC_FEATURE2_DARN and PPC_FEATURE2_SCV were new in v4.12 in commit a4700a26107241cc7b9ac8528b2c6714ff99983d
2018-02-22s390x: add s390_sthyi system call from v4.15Szabolcs Nagy-0/+1
to store hypervisor information, added in linux commit 3d8757b87d7fc15a87928bc970f060bc9c6dc618
2018-02-22netinet/in.h: add new IPV6_FREEBIND from linux v4.15Szabolcs Nagy-0/+1
new socekt option for AF_INET6 SOL_RAW sockets, added in linux commit 84e14fe353de7624872e582887712079ba0b2d56
2018-02-22netinet/tcp.h: add TCP_* socket options from linux v4.15Szabolcs Nagy-0/+2
TCP_FASTOPEN_KEY is new in 1fba70e5b6bed53496ba1f1f16127f5be01b5fb6 TCP_FASTOPEN_NO_COOKIE is new in 71c02379c762cb616c00fd5c4ed253fbf6bbe11b
2018-02-22add MAP_SYNC and MAP_SHARED_VALIDATE from linux v4.15Szabolcs Nagy-0/+7
for synchronous page faults, new in linux commit 1c9725974074a047f6080eecc62c50a8e840d050 and b6fb293f2497a9841d94f6b57bd2bb2cd222da43 note that only targets that use asm-generic/mman.h have this new flag defined, so undef it on other targets (mips*, powerpc*).
2018-02-22mips,powerpc: fix TIOCSER_TEMT in termios.hSzabolcs Nagy-5/+5
use the same token to define TIOCSER_TEMT as is used in ioctl.h so when both headers are included there are no redefinition warnings during musl build.
2018-02-22netinet/tcp.h: add tcp_diag_md5sig struct from linux v4.14Szabolcs Nagy-0/+8
for querying tcp md5 signing keys. new in linux commit c03fa9bcacd9ac04595cc13f34f3445f0a5ecf13
2018-02-22sys/{mman,shm}.h: add {MAP,SHM}_HUGE_ macros from linux uapiSzabolcs Nagy-0/+26
*_HUGE_SHIFT, *_HUGE_2MB, *_HUGE_1GB are documented in the man page, so add all of the *_HUGE_* macros from linux uapi. if MAP_HUGETLB is set, top bits of the mmap flags encode the page size. see the linux commit aafd4562dfee81a40ba21b5ea3cf5e06664bc7f6 if SHM_HUGETLB is set, top bits of the shmget flags encode the page size. see the linux commit 4da243ac1cf6aeb30b7c555d56208982d66d6d33 *_HUGE_16GB is defined unsigned to avoid signed left shift ub.
2018-02-22netinet/if_ether.h: add new ETH_P_ macros from linux v4.14Szabolcs Nagy-0/+4
new ethertypes in linux v4.14: ETH_P_ERSPAN new in 84e54fe0a5eaed696dee4019c396f8396f5a908b ETH_P_IFE new in 2804fd3af6ba5ae5737705b27146455eabe2e2f8 ETH_P_NSH new in 155e6f649757c902901e599c268f8b575ddac1f8 ETH_P_MAP new in 7373ae7e8f0bf2c0718422481da986db5058b005
2018-02-22net/if_arp.h: add ARPHRD_RAWIP from linux v4.14Szabolcs Nagy-0/+1
new in linux commmit cdf4969c42a6c1a376dd03a9e846cf638d3cd4b1
2018-02-22signal.h: add missing SIGTRAP si_codesSzabolcs Nagy-0/+2
TRAP_BRANCH and TRAP_HWBKPT new in linux commit da654b74bda14c45a7d98c731bf3c1a43b6b74e2
2018-02-22aarch64: add HWCAP_DCPOP from linux v4.14Szabolcs Nagy-0/+1
indicates ARMv8.2-DCPoP persistent memory support extension. new in linux commit 7aac405ebb3224037efd56b73d82d181111cdac3
2018-02-22sys/mman.h: add MADV_WIPEONFORK from linux v4.14Szabolcs Nagy-0/+2
allows zeroing anonymous private pages inherited by a child process. new in linux commit d2cd9ede6e193dd7d88b6d27399e96229a551b19
2018-02-22sys/socket.h: add MSG_ZEROCOPY from linux v4.14Szabolcs Nagy-0/+2
MSG_ZEROCOPY socket send flag avoids copy in the kernel new in linux commit 52267790ef52d7513879238ca9fac22c1733e0e3 SO_ZEROCOPY socket option enables MSG_ZEROCOPY if availale new in linux commit 76851d1212c11365362525e1e2c0a18c97478e6b
2018-02-22sys/socket.h: add SOL_TLS from linux v4.13Szabolcs Nagy-0/+1
socket option for kernel TLS support new in linux commit 3c4d7559159bfe1e3b94df3a657b2cda3a34e218
2018-02-22sys/socket.h: add PF_SMC from linux v4.11Szabolcs Nagy-1/+3
add AF_SMC and PF_SMC for the IBM shared memory communication protocol. new in linux commit ac7138746e14137a451f8539614cdd349153e0c0 (linux socket.h is not in uapi so this update was missed earlier)
2018-02-22release 1.1.19v1.1.19Rich Felker-1/+46
2018-02-21update authors/contributors listRich Felker-0/+17
these additions were made by scanning git log since the last major update in commit 790580b2fc47bc20e613336cb937a120422a770c. in addition to git-level commit authorship, "patch by" text in the commit message was also scanned. this idiom was used in the past for patches that underwent substantial edits when merging or where the author did not provide a commit message. going forward, my intent is to use commit authorship consistently for attribution. as before my aim was adding everyone with either substantial code contributions or a pattern of ongoing simple patch submission; any omissions are unintentional.
2018-02-21fix detection of LIBCC for compiler-rt with clangMatúš Olekšák-0/+2
Maintainer's note: at one point, -lcompiler_rt apparently worked, and may still work and be preferable if one has manually installed the library in a public lib directory. but with current versions of clang, the full pathname to the library file is needed. the original patch removed the -lcompiler_rt check; I have left it in place in case there are users depending on it, and since, when it does work, it's preferable so as not to code a dependency on the specific compiler version and paths in config.mak.
2018-02-21convert execvp error handling to switch statementRich Felker-2/+9
this is more extensible if we need to consider additional errors, and more efficient as long as the compiler does not know it can cache the result of __errno_location (a surprisingly complex issue detailed in commit a603a75a72bb469c6be4963ed1b55fabe675fe15).
2018-02-21fix execvp failing on not-dir entries in PATH.Przemyslaw Pawelczyk-1/+1
It's better to make execvp continue PATH search on ENOTDIR rather than issuing an error. Bogus entries should not render rest of PATH invalid. Maintainer's note: POSIX seems to require the search to continue like this as part of XBD 8.3 Other Environment Variables. Only errors that conclusively determine non-existence are candidates for continuing; otherwise for consistency we have to report the error.
2018-02-11fix incorrect overflow check for allocation in fmemopenRich Felker-1/+1
when a null buffer pointer is passed to fmemopen, requesting it allocate its own memory buffer, extremely large size arguments near SIZE_MAX could overflow and result in underallocation. this results from omission of the size of the cookie structure in the overflow check but inclusion of it in the calloc call. instead of accounting for individual small contributions to the total allocation size needed, simply reject sizes larger than PTRDIFF_MAX, which will necessarily fail anyway. then adding arbitrary fixed-size structures is safe without matching up the expressions in the comparison and the allocation.
2018-02-07better configure check for long double supportSzabolcs Nagy-3/+2
2018-02-07make getcwd fail if it cannot obtain an absolute pathDmitry V. Levin-1/+7
Currently getcwd(3) can succeed without returning an absolute path because the underlying getcwd syscall, starting with linux commit v2.6.36-rc1~96^2~2, may succeed without returning an absolute path. This is a conformance issue because "The getcwd() function shall place an absolute pathname of the current working directory in the array pointed to by buf, and return buf". Fix this by checking the path returned by syscall and failing with ENOENT if the path is not absolute. The error code is chosen for consistency with the case when the current directory is unlinked. Similar issue was fixed in glibc recently, see https://sourceware.org/bugzilla/show_bug.cgi?id=22679
2018-02-07disallow non-absolute rpath $ORIGIN for suid/sgid/AT_SECURE processesRich Felker-0/+3
in theory non-absolute origins can only arise when either the main program is invoked by running ldso as a command (inherently non-suid) or when dlopen was called with a relative pathname containing at least one slash. such usage would be inherently insecure in an suid program anyway, so the old behavior here does not seem to have been insecure. harden against it anyway.
2018-02-07honor rpath $ORIGIN for ldd/ldso command with program in working dirRich Felker-1/+10
the rpath fixup code assumed any module's name field would contain at least one slash, an invariant which is usually met but not in the case of a main executable loaded from the current working directory by running ldd or ldso as a command. it would be possible to make this invariant always hold, but it has a higher runtime allocation cost and does not seem useful elsewhere, so just patch things up in fixup_rpath instead.
2018-02-06adjust strftime + modifier to match apparent intent of POSIXRich Felker-6/+12
it's unclear from the specification whether the word "consumes" in "consumes more than four bytes to represent a year" refers just to significant places or includes leading zeros due to field width padding. however the examples in the rationale indicate that the latter was the intent. in particular, the year 270 is shown being formatted by %+5Y as +0270 rather than 00270. previously '+' prefixing was implemented just by comparing the year against 10000. instead, count the number of significant digits and padding bytes to be added, and use the total to determine whether to apply the '+' prefix. based on testing by Dennis Wölfing.
2018-02-05fix strftime field widths with %F format and zero yearRich Felker-1/+2
the code to strip initial sign and leading zeros inadvertently stripped all the zeros and the subsequent '-' separating the month. instead, only strip sign characters from the very first position, and only strip zeros when they are followed by another digit. based on testing by Dennis Wölfing.
2018-02-05document pthread structure ABI constraints in commentsRich Felker-0/+7
in the original submission of the patch that became commit 7c709f2d4f9872d1b445f760b0e68da89e256b9e, and in subsequent reading of it by others, it was not clear that the new member had to be inserted before canary_at_end, or that inserting it at that location was safe. add comments to document.
2018-02-05re-fix child reaping in wordexpAlexander Monakov-7/+1
Do not retry waitpid if the child was terminated by a signal. Do not examine status: since we are not passing any flags, we will not receive stop or continue notifications.
2018-02-05revert regression in faccessat AT_EACCESS robustnessRich Felker-21/+14
commit f9fb20b42da0e755d93de229a5a737d79a0e8f60 switched from using a pipe for the result to conveying it via the child process exit status. Alexander Monakov pointed out that the latter could fail if the application is not expecting faccessat to produce a child and performs a wait operation with __WCLONE or __WALL, and that it is not clear whether it's guaranteed to work when SIGCHLD's disposition has been set to SIG_IGN. in addition, that commit introduced a bug that caused EACCES to be produced instead of EBUSY due to an exit path that was overlooked when the error channel was changed, and introduced a spurious retry loop around the wait operation.
2018-02-03store pthread stack guard sizes for pthread_getattr_npWilliam Pitcock-1/+4
2018-02-02adjust dladdr dli_fbase definition to match other implementationsRich Felker-1/+1
the Linux and FreeBSD man pages for dladdr document dli_fbase as the "base address" of the library/module found. normally (e.g. AT_BASE) the term "base" is used to denote the base address relative to which p_vaddr addresses are interpreted; however in the case of dladdr's Dl_info structure, existing implementations define it as the lowest address of the mapping, which makes sense in the context of determining which module's memory range the input address falls within. since this is a nonstandard interface provided to mimic one provided by other implementations, adjust it to match their behavior.
2018-01-31getopt_long: accept prefix match of long options containing equals signsSamuel Holland-1/+2
Consider the first equals sign found in the option to be the delimiter between it and its argument, even if it matches an equals sign in the option name. This avoids consuming the equals sign, which would prevent finding the argument. Instead, it forces a partial match of the part of the option name before the equals sign. Maintainer's note: GNU getopt_long does not explicitly document this behavior, but it can be seen as a consequence of how partial matches are specified, and at least GNU (bfd) ld is known to make use of it.
2018-01-31fix getopt_long arguments to partial matchesSamuel Holland-1/+3
If we find a partial option name match, we need to keep looking for ambiguous/conflicting options. However, we need to remember the position in the candidate argument to find its option-argument later, if there is one. This fixes e.g. option "foobar" being given as "--fooba=baz".
2018-01-31aarch64: fix mismatched type of ucontext_t uc_link memberWilliam Pitcock-1/+1
2018-01-12add _DIRENT_HAVE_D_* macros to dirent.hRostislav Skudnov-0/+4
2018-01-10fix printf alt-form octal with value 0 and no explicit precisionRich Felker-2/+2
commit 78897b0dc00b7cd5c29af5e0b7eebf2396d8dce0 wrongly simplified Dmitry Levin's original submitted patch fixing alt-form octal with the zero flag and field width present, omitting the special case where the value is zero. as a result, printf("%#o",0) wrongly prints "00" rather than "0". the logic prior to this commit was actually better, in that it was aligned with how the alt-form flag (#) for printf is specified ("it shall increase the precision"). at the time there was no good way to avoid the zero flag issue with the old logic, but commit 167dfe9672c116b315e72e57a55c7769f180dffa added tracking of whether an explicit precision was provided. revert commit 78897b0dc00b7cd5c29af5e0b7eebf2396d8dce0 and switch to using the explicit precision indicator for suppressing the zero flag.
2018-01-09revise the definition of multiple basic locks in the codeJens Gustedt-16/+16
In all cases this is just a change from two volatile int to one.
2018-01-09consistently use the LOCK an UNLOCK macrosJens Gustedt-12/+12
In some places there has been a direct usage of the functions. Use the macros consistently everywhere, such that it might be easier later on to capture the fast path directly inside the macro and only have the call overhead on the slow path.
2018-01-09new lock algorithm with state and congestion count in one atomic intJens Gustedt-8/+58
A variant of this new lock algorithm has been presented at SAC'16, see https://hal.inria.fr/hal-01304108. A full version of that paper is available at https://hal.inria.fr/hal-01236734. The main motivation of this is to improve on the safety of the basic lock implementation in musl. This is achieved by squeezing a lock flag and a congestion count (= threads inside the critical section) into a single int. Thereby an unlock operation does exactly one memory transfer (a_fetch_add) and never touches the value again, but still detects if a waiter has to be woken up. This is a fix of a use-after-free bug in pthread_detach that had temporarily been patched. Therefore this patch also reverts c1e27367a9b26b9baac0f37a12349fc36567c8b6 This is also the only place where internal knowledge of the lock algorithm is used. The main price for the improved safety is a little bit larger code. Under high congestion, the scheduling behavior will be different compared to the previous algorithm. In that case, a successful put-to-sleep may appear out of order compared to the arrival in the critical section.
2018-01-09add additional uapi guards for Linux kernel header filesHauke Mehrtens-0/+10
With Linux kernel 4.16 it will be possible to guard more parts of the Linux header files from a libc. Make use of this in musl to guard all the structures and other definitions from the Linux header files which are also defined by the header files provided by musl. This will make it possible to compile source files which include both the libc headers and the kernel userspace headers. This extends the definitions done in commit 04983f227238 ("make netinet/in.h suppress clashing definitions from kernel headers")
2017-12-18fix iconv output of surrogate pairs in ucs2Rich Felker-1/+1
in the unified code for handling utf-16 and ucs2 output, the check for ucs2 wrongly looked at the source charset rather than the destination charset.
2017-12-18add support for BOM-determined-endian UCS2, UTF-16, and UTF-32 to iconvRich Felker-3/+40
previously, the charset names without endianness specified were always interpreted as big endian. unicode specifies that UTF-16 and UTF-32 have BOM-determined endianness if BOM is present, and are otherwise big endian. since commit 5b546faa67544af395d6407553762b37e9711157 added support for stateful encodings, it is now possible to implement BOM support via the conversion descriptor state. for conversions to these charsets, the output is always big endian and does not have a BOM.
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