From nobody Sat Mar 14 12:03:05 2026 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fY0Nv126xz6VmqP for ; Sat, 14 Mar 2026 12:03:11 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R12" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fY0Nv0Dr2z43PH for ; Sat, 14 Mar 2026 12:03:11 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1773489791; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=T2XaKbPYA0p/GzCWTED/cZRU29j4O1Ekr7sZuSALtOI=; b=JKoe8ft/fCGe3KHYi9n76mf+q6rxJAN6il+eMzFqv4eLcZF+pbwLk4ZKPEdeufwhNvuUhE wo/uBQNddIHaJ+fHq/6eiLUhjr9jQ1jFq+MVbndb3ukipwoplHYZ4obIPugJrGlGnOrFgk eJqHD32Xcfzwna542JrC9F7pjmg8Clu+yfwMOvxilucD1tqARh73QiuFmNll8v5nevaEN/ 0aIpr49zfz1uLbG5k0o19omKSQCegNQqdUkOp8v7/uI8U8Ta8QUzw114616KotXH7ybvSi eGYFITzJ0mWJNiEsCHv0ywpn2Y4dZEhT5rWb9OI66rqp1i7WeifJXXGz/5CICw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1773489791; a=rsa-sha256; cv=none; b=eXB/6RLat2uzcDQZ7eqjRTrV5P6epr19jNN0vxTca6v936gIz2YVyNW/UEGeFbZgkru6IL 8lfFso55GPGUnod9mQtvexLntIY9j9XJp4eZTtwv04n0jGuyMXiE6nZvUaZSh6eU5wSe65 AZppKHzWOmPq/Ee+iwaaE5Wh6a/48DL9pAwqUm9zh/ZV1Q352SVkdFp1LZh99IuC14qCHp /3n2/V16rerEEaTrHWLZ6IAPX8WWh9lj6/KhFxcPSuaXHCBxynK87Ff8KwSwe3fnNoh8pT XEt7/Z6dQn7EjXOmp/JAXfUYi0q1vEMEFPoHZOhBMOvCVdZPMpT3Z3j/AD/MiQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1773489791; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=T2XaKbPYA0p/GzCWTED/cZRU29j4O1Ekr7sZuSALtOI=; b=EQXDwKdpqGuRgSrh70o3I7gxCbkESkiayyKgVGhMkLp2BYpo4hs6xT6f1GzkziGFwNZFD8 ggLaqP/okPWF2e9v/3JnGiO08vGuHh/O0GSqR+KJc9mBL5refFjpbPHHYCMIOz5dx/D+0k q+K8qNgN3cV5YMmf7fmnm1lQZsycMkoUaHpSR2nkhU3brL4miOg6b7yCdGfaBb/kDQ9ecb pjU8GknlQRXXvEZJ+DSLND7+ew9ft/2/VcRTEvyYINYB1oxSzANUPRm7fTWBNqIArVwh+Y pXim2jXekxQojOZaQxT/I9C1CTKemBIoDM05nrSs7OP0zgze0bu0C786vnzIGw== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4fY0Nt6Wv1z1Gh0 for ; Sat, 14 Mar 2026 12:03:10 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 31471 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Sat, 14 Mar 2026 12:03:05 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Konstantin Belousov Subject: git: 756689232e6a - stable/15 - sigreturn.2: refresh the man page List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/stable/15 X-Git-Reftype: branch X-Git-Commit: 756689232e6a9e227c26b56f91624d69a08fdcce Auto-Submitted: auto-generated Date: Sat, 14 Mar 2026 12:03:05 +0000 Message-Id: <69b54e79.31471.6b04b1d8@gitrepo.freebsd.org> The branch stable/15 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=756689232e6a9e227c26b56f91624d69a08fdcce commit 756689232e6a9e227c26b56f91624d69a08fdcce Author: Konstantin Belousov AuthorDate: 2026-03-08 20:08:42 +0000 Commit: Konstantin Belousov CommitDate: 2026-03-14 12:02:34 +0000 sigreturn.2: refresh the man page (cherry picked from commit 9da4a804f0916b24519b8baa7ed460a7ba23d8c8) --- lib/libsys/sigreturn.2 | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/lib/libsys/sigreturn.2 b/lib/libsys/sigreturn.2 index 4effeaa5abc7..0e7bca507fc7 100644 --- a/lib/libsys/sigreturn.2 +++ b/lib/libsys/sigreturn.2 @@ -25,7 +25,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd September 6, 2013 +.Dd March 11, 2026 .Dt SIGRETURN 2 .Os .Sh NAME @@ -47,17 +47,25 @@ The thread's signal mask and stack status are restored from the context structure pointed to by .Fa scp . The system call does not return; -the users stack pointer, frame pointer, argument pointer, -and processor status longword are restored from the context. -Execution resumes at the specified pc. -This system call is used by the trampoline code and -.Xr longjmp 3 +the whole userspace context as specified by +.Fa scp , +including the userspace stack pointer, all general-purpose registers, +coprocessor state, process status register, and program counter +are restored from the context. +Execution resumes at the program counter from the specified context. +.Pp +This system call is used by the kernel-provided signal trampoline code, +located in the virtual DSO (VDSO) on some architectures or as raw code +in the shared page if VDSO is not provided, when returning from a signal to the previously executing program. .Sh RETURN VALUES If successful, the system call does not return. -Otherwise, a value of -1 is returned and +Otherwise, a value of -1 may be returned, with .Va errno -is set to indicate the error. +set to indicate the error. +Some conditions detected by hardware result in the delivery of +a synchronous trap signal to the thread, in addition to or instead of +setting the system call error code. .Sh ERRORS The .Fn sigreturn