src/lib/libc/arm, branch main

libc/armv7: remove default version for alloca

2026-03-05T10:34:47+00:00

The alloca() interface has been a macro expanding to __builtin_alloca()
since 2003 (commit 79806b4cdce0, included in FreeBSD 5.2).  Even before
that virtually every compiler version I was able to test replaced
alloca() with compiler generated code when targeting C.

Hide it to prevent future (mis)use.

Reviewed by:	imp, kib
Differential Revision:	https://reviews.freebsd.org/D51858

libc/arm: use __builtin_trap() instead of abort() in aeabi_unwind stubs

2026-02-13T17:52:25+00:00

This avoids a dependency on the abort symbol in libsys.

PR:		292539
Reviewed by:	mmel
Approved by:	markj (mentor)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D55255

libc: remove ARMv5/6 from man page

2025-11-29T04:56:38+00:00

Signed-off-by: Minsoo Choo 
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1903

libc, libthr: Ditch MD __pthread_distribute_static_tls helpers

2025-05-29T16:06:54+00:00

_libc_get_static_tls_base() is just _tcb_get() followed by adding (for
Variant I) or subtracting (for Variant II) the offset, so just inline
that as the implementation (like we do in rtld-elf) rather than having
another copy (or equivalent) of _tcb_get()'s assembly.

_get_static_tls_base() doesn't even have any MD assembly as it's
reading thr->tcb, the only difference is whether to add or subtract, so
again just inline that.

Whilst here add some missing blank lines to comply with style(9) for
elf_utils.c's includes, and use a pointer type rather than uintptr_t to
reduce the need to cast, as is done in rtld-elf.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D50592

libgcc_s: export integer and floating point __aeabi_ symbols

2025-05-04T11:48:32+00:00

Export all integer and floating point __aeabi_ functions defined by
"Run-time ABI for Arm Architecture" from libgcc, excluding __aeabi_h2f_alt,
__aeabi_f2h_alt and __aeabi_d2h_alt, which are not yet implemented by
compiler-rt.

To maintain ABI backward compatibility, convert __aeabi_ floating-point
symbols previously exported from libc to an explicit non-default version.

Remove guessing of vfp/not-vfp version  for compiler-rt sources. The vfp
version needs additional runtime logic to select the right implementation
and we don't have it implemented.

MFC after:	1 month
Reviewed by:	dim
PR:		271087
Differential Revision:	https://reviews.freebsd.org/D50100

Remove residual blank line at start of Makefile

2024-07-15T22:43:39+00:00

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

libc: Replace armv6 with armv7 in a comment

2024-06-20T09:26:22+00:00

Armv6 is being removed from the treem and the comment applies to armv7.

Reviewed by:	manu, imp, emaste
Sponsored by:	Arm Ltd
Differential Revision:	https://reviews.freebsd.org/D45645

lib: Remove __ARM_ARCH checks that are always true

2024-06-12T11:49:05+00:00

Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D45559

libc/arm: export __signalcontext not _signalcontext

2024-04-16T21:14:21+00:00

The former exists and architectures other than aarch64 and riscv provide
it.  The later does not exist.

Differential Revision:	https://reviews.freebsd.org/D44329

libc/softfloat: we don't export _fp[gs]et* symbols

2024-03-13T20:35:41+00:00

Remove attempts to use NetBSD __weak_alias macros to export _-prefixed
versions of various fp[sg]et* symbols under softfloat.  __weak_alias
isn't defined so we didn't export them and thus the Symbol.map entries
were wrong.

Reviewed by:	jhibbits
Differential Revision:	https://reviews.freebsd.org/D44327