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Fri, 05 Jun 2026 01:20:56 -0700 (PDT) Received: from ramin-pc ([178.19.210.170]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490bc39def5sm127955605e9.5.2026.06.05.01.20.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Jun 2026 01:20:54 -0700 (PDT) From: Ramin Moussavi To: Michal Simek Cc: linux-kernel@vger.kernel.org, Ramin Moussavi , Ramin Moussavi Subject: [PATCH v2 1/2] microblaze: wire up sigaltstack Date: Fri, 5 Jun 2026 10:20:49 +0200 Message-ID: <842268707ace03f5be69e70a30ff0de7a9a9d6ef.1780647609.git.lordrasmus@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit sigaltstack is wired to sys_ni_syscall - microblaze is the only architecture without it - although the microblaze signal delivery code fully supports the alternate signal stack: get_sigframe() picks the stack via sigsp(), setup_rt_frame() saves it with __save_altstack() and sys_rt_sigreturn() calls restore_altstack(). Wire it up to sys_sigaltstack. Tested on qemu petalogix-s3adsp1800 (microblazeel, kernel 6.5.10 and syscall table unchanged in current mainline) with the uClibc-ng test suite: the five sigaltstack-dependent NPTL tests (tst-cancel20/21, tst-cancelx20/21, tst-signal6) pass; before this change sigaltstack() returned ENOSYS. Signed-off-by: Ramin Moussavi --- arch/microblaze/kernel/syscalls/syscall.tbl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index 223d26303..b4ce48e8a 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -193,7 +193,7 @@ 183 common getcwd sys_getcwd 184 common capget sys_capget 185 common capset sys_capset -186 common sigaltstack sys_ni_syscall +186 common sigaltstack sys_sigaltstack 187 common sendfile sys_sendfile 188 common getpmsg sys_ni_syscall 189 common putpmsg sys_ni_syscall -- 2.53.0