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2016-10-20fix clock_nanosleep error caseDaniel Sabogal-1/+3
posix requires that EINVAL be returned if the first parameter specifies the cpu-time clock of the calling thread (CLOCK_THREAD_CPUTIME_ID). linux returns ENOTSUP instead so we handle this.
2016-10-20math: fix pow signed shift ubSzabolcs Nagy-2/+2
j is int32_t and thus j<<31 is undefined if j==1, so j is changed to uint32_t locally as a quick fix, the generated code is not affected. (this is a strict conformance fix, future c standard may allow 1<<31, see DR 463. the bug was inherited from freebsd fdlibm, the proper fix is to use uint32_t for all bit hacks, but that requires more intrusive changes.) reported by Daniel Sabogal
2016-10-20update icmphdr struct following linux v4.8Szabolcs Nagy-0/+1
add union field that is used in the kernel for SIT/GRE tunneling ICMPv4 messages. see linux commit 20e1954fe238dbe5f8d3a979e593fe352bd703cf
2016-10-20add TCP_REPAIR_WINDOW to netinet/tcp.h from linux v4.8Szabolcs Nagy-0/+9
another kernel internal state exposure for checkpoint-restore. see linux commit b1ed4c4fa9a5ccf325184fd90edc50978ef6e33a
2016-10-20add bits/hwcap.h and include it in sys/auxv.hSzabolcs Nagy-0/+138
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.
2016-10-20elf.h: update EM_ elf machine defines and add R_BPF_ definesSzabolcs Nagy-1/+101
sync with gabi: EM_BPF is new in linux v4.8 and officially assigned: added related relocs too.
2016-10-20add ETH_P_NCSI to netinet/if_ether.h from linux v4.8Szabolcs Nagy-0/+1
see linux commit 6389eaa7fa9c3ee6c7d39f6087b86660d17236ac
2016-10-20add sh syscall numbers from linux v4.8Szabolcs Nagy-0/+14
sh was updated in linux commit 74bdaa611fa69368fb4032ad437af073d31116bd to have numbers for new syscalls.
2016-10-20fix preadv2 and pwritev2 syscall numbers on x32 for linux v4.8Szabolcs Nagy-2/+2
the numbers were wrong in musl, but they were also wrong in the kernel and got fixed in v4.8 commit 3ebfd81f7fb3e81a754e37283b7f38c62244641a
2016-10-20use dynamic buffer for getmntentNatanael Copa-4/+13
overlayfs may have fairly long lines so we use getline to allocate a buffer dynamically. The buffer will be allocated on first use, expand as needed, but will never be free'ed. Downstream bug: Signed-off-by: Natanael Copa <>
2016-10-20fix integer overflows and uncaught EOVERFLOW in printf coreRich Felker-46/+89
this patch fixes a large number of missed internal signed-overflow checks and errors in determining when the return value (output length) would exceed INT_MAX, which should result in EOVERFLOW. some of the issues fixed were reported by Alexander Cherepanov; others were found in subsequent review of the code. aside from the signed overflows being undefined behavior, the following specific bugs were found to exist in practice: - overflows computing length of floating point formats with huge explicit precisions, integer formats with prefix characters and huge explicit precisions, or string arguments or format strings longer than INT_MAX, resulted in wrong return value and wrong %n results. - literal width and precision values outside the range of int were misinterpreted, yielding wrong behavior in at least one well-defined case: string formats with precision greater than INT_MAX were sometimes truncated. - in cases where EOVERFLOW is produced, incorrect values could be written for %n specifiers past the point of exceeding INT_MAX. in addition to fixing these bugs, we now stop producing output immediately when output length would exceed INT_MAX, rather than continuing and returning an error only at the end.
2016-10-19fix integer overflow in float printf needed-precision computationRich Felker-1/+1
if the requested precision is close to INT_MAX, adding LDBL_MANT_DIG/3+8 overflows. in practice the resulting undefined behavior manifests as a large negative result, which is then used to compute the new end pointer (z) with a wildly out-of-bounds value (more overflow, more undefined behavior). the end result is at least incorrect output and character count (return value); worse things do not seem to happen, but detailed analysis has not been done. this patch fixes the overflow by performing the intermediate computation as unsigned; after division by 9, the final result necessarily fits in int.
2016-10-06fix regexec with haystack strings longer than INT_MAXRich Felker-26/+28
we inherited from TRE regexec code that's utterly wrong with respect to the integer types it's using. while it doesn't appear that compilers are producing unsafe output, signed integer overflows seem to happen, and regexec fails to find matches past offset INT_MAX. this patch fixes the type of all variables/fields used to store offsets in the string from int to regoff_t. after the changes, basic testing showed that regexec can now find matches past 2GB (INT_MAX) and past 4GB on x86_64, and code generation is unchanged on i386.
2016-10-06fix missing integer overflow checks in regexec buffer size computationsRich Felker-5/+18
most of the possible overflows were already ruled out in practice by regcomp having already succeeded performing larger allocations. however at least the num_states*num_tags multiplication can clearly overflow in practice. for safety, check them all, and use the proper type, size_t, rather than int. also improve comments, use calloc in place of malloc+memset, and remove bogus casts.
2016-10-06fix strftime %y for negative tm_yearSzabolcs Nagy-0/+1
2016-09-24fix getservby*_r result pointer value on errorDaniel Sabogal-0/+3
this is a clone of the fix to the gethostby*_r functions in commit fe82bb9b921be34370e6b71a1c6f062c20999ae0. the man pages document that the getservby*_r functions set this pointer to NULL if there was an error or if no record was found.
2016-09-24remove dead case in gethostbyname2_rDaniel Sabogal-2/+0
this case statement was accidently left behind when this function was refactored in commit e8f39ca4898237cf71657500f0b11534c47a0521.
2016-09-19fix undefined behavior in sched.h cpu_set_t usageRich Felker-3/+3
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 *.
2016-09-18simplify/refactor fflush and make fflush_unlocked an alias for fflushRich Felker-30/+23
previously, fflush_unlocked was an alias for an internal backend that was called by fflush, either for its argument or in a loop for each file if a null pointer was passed. since the logic for the latter was in the main fflush function, fflush_unlocked crashed when passed a null pointer, rather than flushing all open files. since fflush_unlocked is not a standard function and has no specification, it's not clear whether it should be expected to accept null pointers like fflush does, but a reasonable argument could be made that it should. this patch eliminates the helper function, simplifying fflush, and makes fflush_unlocked an alias for fflush, which is valid because the two functions agree in their behavior in all cases where their behavior is defined (the unlocked version has undefined behavior if another thread could hold locks).
2016-09-16add missing *_unlocked and wcsftime_l prototypes to wchar.hDaniel Sabogal-0/+15
these functions had been implemented, but prototypes were not made available
2016-09-16fix if_indextoname error caseDaniel Sabogal-1/+6
posix requires errno to be set to ENXIO if the interface does not exist. linux returns ENODEV instead so we handle this.
2016-09-16fix ifru_data and ifcu_buf types in net/if.hDaniel Sabogal-2/+2
glibc, freebsd, and openbsd use character pointers (caddr_t) for these fields. only linux uses void pointer for the ifru_data type.
2016-09-16fix printf regression with alt-form octal, zero flag, and field widthRich Felker-1/+1
commit b91cdbe2bc8b626aa04dc6e3e84345accf34e4b1, in fixing another issue, changed the logic for how alt-form octal adds the leading zero to adjust the precision rather than using a prefix character. this wrongly suppressed the zero flag by mimicing an explicit precision given by the format string. switch back to using a prefix character. based on bug report and patch by Dmitry V. Levin, but simplified.
2016-08-30restore _Noreturn to __assert_failRich Felker-2/+2
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.
2016-08-30getdtablesize: fix returning hard instead of soft rlimitOlivier Brunel-1/+1
This makes the result consistent with sysconf(_SC_OPEN_MAX).
2016-08-30fix FFSYNC by changing it to O_SYNCDuncan Overbruck-1/+1
O_FSYNC was never defined and is legacy/wrong, nothing seems to use it.
2016-08-30configure: handle mipsisa64* triplet as a mips64 targetSzabolcs Nagy-1/+1
the gnu config.sub script recognizes several mipsisa64* cpu types that musl supports as mips64 targets.
2016-08-30math: fix 128bit long double inverse trigonometric functionsSzabolcs Nagy-1/+1
there was a copy paste error that could cause large ulp errors in atan2l, atanl, asinl and acosl on aarch64, mips64 and mipsn32. (the implementation is from freebsd fdlibm, but the tail end of the polynomial was wrong. 128 bit long double functions are not yet tested so this went undetected.)
2016-08-30verify that ttyname refers to the same file as the fdSzabolcs Nagy-4/+11
linux containers use separate mount namespace so the /proc symlink might not point to the right device if the fd was opened in the parent namespace, in this case return ENOENT.
2016-08-30microblaze: add syscall numbers from linux v4.7Szabolcs Nagy-0/+3
userfaultfd, membarrier and mlock2 syscalls got wired up in linux commit fbce3befd60d40639bf3c6b60f7477b2f988f92d
2016-08-30add SS_AUTODISARM sigaltstack ss_flags from linux v4.7 to signal.hSzabolcs Nagy-0/+2
only matters if swapcontext is used in a signal handler running on an altstack, new in linux commit 2a74213838104a41588d86fd5e8d344972891ace
2016-08-30add UDP_ENCAP_GTP0, UDP_ENCAP_GTP1U from linux v4.7 to netinet/udp.hSzabolcs Nagy-0/+2
for GPRS tunneling protocol, new in linux commit 459aa660eb1d8ce67080da1983bb81d716aa5a69
2016-08-30add PF_QIPCRTR, AF_QIPCRTR from linux v4.7 to sys/socket.hSzabolcs Nagy-1/+3
macros for qualcom ip router protocol, new in linux commit bdabad3e363d825ddf9679dd431cca0b2c30f881
2016-08-11fix pread/pwrite syscall calling convention on shRich Felker-2/+7
despite sh not generally using register-pair alignment for 64-bit syscall arguments, there are arch-specific versions of the syscall entry points for pread and pwrite which include a dummy argument for alignment before the 64-bit offset argument.
2016-07-13revert unrelated change that slipped into last commitRich Felker-1/+1
2016-07-13fix regression in tcsetattr on all mips archsRich Felker-10/+10
revert commit 8c316e9e49d37ad92c2e7493e16166a2afca419f. it was wrong and does not match how the kernel API works.
2016-07-07fix asctime day/month names not to vary by localeRich Felker-5/+4
the FIXME comment here was overlooked at the time locale support was added.
2016-07-06remove obsolete and unused gethostbyaddr implementationRich Felker-52/+0
this code was already under #if 0, but could be confusing if a reader didn't notice that, and it's almost surely full of bugs and/or inconsistencies with the current code that uses the gethostbyname2_r backend.
2016-07-06remove obsolete gitignore rulesBobby Bingham-2/+0
Since commit 2f853dd6b9a95d5b13ee8f9df762125e0588df5d, all generated headers are generated under the obj directory, which is already ignored.
2016-07-06remove or1k version of sem.hBobby Bingham-11/+0
It's identical to the generic version, after evaluating the endian preprocessor checks in the generic version.
2016-07-05release 1.1.15v1.1.15Rich Felker-1/+40
2016-07-03add stdc-predef.h for library-level predefined macrosRich Felker-0/+10
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.
2016-07-03improve abort fallback behavior when raising SIGABRT fails to terminateRich Felker-1/+5
these changes still do not yield a fully-conforming abort, but they fix two known issues: - per POSIX, termination via SIGKILL is not "abnormal", but both ISO C and POSIX require abort to yield abnormal termination. - raising SIGKILL fails to do anything to pid 1 in some containers. now, the trapping instruction produced by a_crash() is expected to produce abnormal termination, without the risk of invoking a signal handler since SIGILL and SIGSEGV are blocked, and _Exit, which contains an infinite loop analogous to the one being removed from abort itself, is used as a last resort. this implementation still fails to produce an exit status as if the process terminated via SIGABRT in cases where SIGABRT is blocked or ignored, but fixing that is not easy; the obvious pseudo-solutions all have subtle race conditions where a concurrent fork or exec can expose incorrect signal state.
2016-07-03make brace placement in public header typedef'd structs consistentRich Felker-34/+17
commit befa5866ee30d09c0c96e88af2eabff5911342ea performed this change for struct definitions that did not also involve typedef, but omitted the latter.
2016-07-03add EF_SH_ sh specific macros to elf.hSzabolcs Nagy-1/+22
last time elf.h was thoroughly updated sh was not yet supported so these processor specific e_flags were missing.
2016-07-03add NT_ARM_SYSTEM_CALL to elf.hSzabolcs Nagy-0/+1
new regset in linux v3.18 for ptrace.
2016-07-03add missing x86 relocs to elf.hSzabolcs Nagy-2/+5
2016-07-03add DT_MIPS_RLD_MAP_REL to elf.hSzabolcs Nagy-1/+2
marks different RLD_MAP for debugging PIE binaries.
2016-07-03add SHF_COMPRESSED section flag to elf.hSzabolcs Nagy-0/+23
2016-07-03add powerpc tls optimization related definitions to elf.hSzabolcs Nagy-2/+6