src/lib/libc/sys, branch main

lib/libsys, lib/libc: export pdwait

2026-01-25T15:54:08Z

Make pdwait(2) cancellable, same as all other wait*(2) syscalls wrappers. Reviewed by: asomers, markj Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D54592

libc: stop trying to create __ symbols

2025-08-06T11:31:24Z

When we switched to an interposing table (commit 8495e8b1e9e1) for cancelation points we stopped having concrete implementations of __ and instead use __sys_ and __thr_. These entries of the form: __weak_reference(__sys_, __); seem to be intended to preserve these symbols, but they have no effect as __sys_ isn't defined in the translation units in question. Reviewed by: imp Differential Revision: https://reviews.freebsd.org/D51668

closefrom: always use close_range(2)

2025-06-06T21:58:29Z

close_range(2) was added prior to 13.0. There is no need to support a new userspace on such an old kernel. Reviewed by: kevans, imp Differential Revision: https://reviews.freebsd.org/D50730

libc: switch to __weak_symbol for fortified interpose stubs

2024-07-16T05:12:28Z

GCC doesn't like `#pragma weak macro(foo)`, but that's fine; just slap a __weak_symbol on the definition to more reliably make it weak anyways. Reviewed by: kib (earlier version), markj Sponsored by: Klara, Inc. Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D45976

include: ssp: fortify

2024-07-13T05:16:26Z

The entire recv*() implementation set is ripe for opportunities to validate, so do what we can with what we have. Reviewed by: markj Sponsored by: Klara, Inc. Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D45686

include: ssp: fortify

2024-07-13T05:16:25Z

Check both the buffer size of the iov object itself, as well as that of each indidvidually io base. Reviewed by: markj Sponsored by: Klara, Inc. Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D45684

include: ssp: fortify poll/ppoll from

2024-07-13T05:16:24Z

For poll/ppoll we just need to bounds-check the poll array that we're about to write out to. Reviewed by: kib, markj (earlier version) Sponsored by: Klara, Inc. Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D45680

Revert "lib{c,sys}: normalize export of openat, setcontext, and swapcontext"

2024-04-19T21:25:04Z

I put the symbols in the wrong file (should have been lib/libc/sys/Symbol.map), added a duplicate pdfork entry due to a botch rebase, and there seems to be a issue with gcc13/binutils not exposing the symbols so revert the whole thing while I debug. This reverts commit ee632fb9eb4a060a4087a7f5425bfe36e65cda61.

lib{c,sys}: normalize export of openat, setcontext, and swapcontext

2024-04-17T22:39:46Z

List them in the symbol map rather than using the __sym_default to expose them. This will allow later improvements in the stub implementations in libc.so. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D44113

libc: INTERPOS_SYS macro for interposed syscalls

2024-04-16T16:48:08Z

This macro makes uses the __sys__t typedefs from libsys.h to greatly simplify calling functions in the interposing table. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D44389