src-test/lib/libc/include, branch main

Implement strerror_l().

2020-12-16T09:02:09Z

Only for the arches that provide user-mode TLS. PR: 251651 Requested by: yuri Discussed with: emaste, jilles, tijl Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D27495 MFC after: 2 weeks

libc: Add pthread_attr_get_np(3) stub, reporting ESRCH.

2020-11-28T12:19:20Z

This seems to be required by recent clang asan. I do not see other way than put the symbol under FBSD_1.0 version. PR: 251112 Reported by: Andrew Stitcher Reviewed by: emaste Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D27389

Add pthread_getname_np() and pthread_setname_np() aliases for

2020-06-10T22:13:24Z

pthread_get_name_np() and pthread_set_name_np(). This re-applies r361770 after compatibility fixes. Reviewed by: antoine, jkim, markj Tested by: antoine (exp-run) Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D25117

Mark closefrom(2) COMPAT12, reimplement in libc to wrap close_range

2020-04-14T18:07:42Z

Include a temporarily compatibility shim as well for kernels predating close_range, since closefrom is used in some critical areas. Reviewed by: markj (previous version), kib Differential Revision: https://reviews.freebsd.org/D24399

Add linux-compatible memfd_create

2019-09-25T18:03:18Z

memfd_create is effectively a SHM_ANON shm_open(2) mapping with optional CLOEXEC and file sealing support. This is used by some mesa parts, some linux libs, and qemu can also take advantage of it and uses the sealing to prevent resizing the region. This reimplements shm_open in terms of shm_open2(2) at the same time. shm_open(2) will be moved to COMPAT12 shortly. Reviewed by: markj, kib Differential Revision: https://reviews.freebsd.org/D21393

Add libc stub for pthread_getthreadid_np(3).

2019-06-23T10:50:26Z

Requested by: jbeich PR: 238650 Sponsored by: The FreeBSD Foundation MFC after: 1 week

Fix initial exec TLS mode for dynamically loaded shared objects.

2019-03-29T17:52:57Z

If dso uses initial exec TLS mode, rtld tries to allocate TLS in static space. If there is no space left, the dlopen(3) fails. If space if allocated, initial content from PT_TLS segment is distributed to all threads' pcbs, which was missed and caused un-initialized TLS segment for such dso after dlopen(3). The mode is auto-detected either due to the relocation used, or if the DF_STATIC_TLS dynamic flag is set. In the later case, the TLS segment is tried to allocate earlier, which increases chance of the dlopen(3) to succeed. LLD was recently fixed to properly emit the flag, ld.bdf did it always. Initial test by: dumbbell Tested by: emaste (amd64), ian (arm) Tested by: Gerald Aryeetey (arm64) Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D19072

Bump sys_errlist size to keep ABI backward-compatible for some time.

2018-12-27T13:02:15Z

Addition of the new errno values requires adding new elements to sys_errlist array, which is actually ABI-incompatible, since ELF records the object size. Expand array in advance to 150 elements so that we have our users to go over the issue only once, at least until more than 53 new errors are added. I did not bumped the symbol version, same as it was not done for previous increases of the array size. Runtime linker only copies as much data into binary object on copy relocation as the binary'object specifies. This is not fixable for binaries which access sys_errlist directly. While there, correct comment and calculation of the temporary buffer size for the message printed for unknown error. The on-stack buffer is used only for the number and delimiter since r108603. Requested by: mckusick Reviewed by: mckusick, yuripv MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D18656

Update userland arc4random() with OpenBSD's Chacha20 based arc4random().

2018-08-19T17:40:50Z

ObsoleteFiles.inc: Remove manual pages for arc4random_addrandom(3) and arc4random_stir(3). contrib/ntp/lib/isc/random.c: contrib/ntp/sntp/libevent/evutil_rand.c: Eliminate in-tree usage of arc4random_addrandom(). crypto/heimdal/lib/roken/rand.c: crypto/openssh/config.h: Eliminate in-tree usage of arc4random_stir(). include/stdlib.h: Remove arc4random_stir() and arc4random_addrandom() prototypes, provide temporary shims for transistion period. lib/libc/gen/Makefile.inc: Hook arc4random-compat.c to build, add hint for Chacha20 source for kernel, and remove arc4random_addrandom(3) and arc4random_stir(3) links. lib/libc/gen/arc4random.c: Adopt OpenBSD arc4random.c,v 1.54 with bare minimum changes, use the sys/crypto/chacha20 implementation of keystream. lib/libc/gen/Symbol.map: Remove arc4random_stir and arc4random_addrandom interfaces. lib/libc/gen/arc4random.h: Adopt OpenBSD arc4random.h,v 1.4 but provide _ARC4_LOCK of our own. lib/libc/gen/arc4random.3: Adopt OpenBSD arc4random.3,v 1.35 but keep FreeBSD r114444 and r118247. lib/libc/gen/arc4random-compat.c: Compatibility shims for arc4random_stir and arc4random_addrandom functions to preserve ABI. Log once when called but do nothing otherwise. lib/libc/gen/getentropy.c: lib/libc/include/libc_private.h: Fold __arc4_sysctl into getentropy.c (renamed to arnd_sysctl). Remove from libc_private.h as a result. sys/crypto/chacha20/chacha.c: sys/crypto/chacha20/chacha.h: Make it possible to use the kernel implementation in libc. PR: 182610 Reviewed by: cem, markm Obtained from: OpenBSD Relnotes: yes Differential Revision: https://reviews.freebsd.org/D16760

Add pthread_get_name_np(3).

2018-08-17T18:34:07Z

The function retrieves the thread name previously set by pthread_set_name_np(3). The name is cached in the process memory. Requested by: Willem Jan Withagen Man page update: Yuri Pankov Reviewed by: ian (previous version) Discussed with: arichardson, bjk (man page) Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D16702