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Sun, 01 Mar 2026 20:22:02 -0800 (PST) From: Warner Losh To: qemu-devel@nongnu.org Cc: Reinoud Zandijk , Warner Losh , Ryo ONODERA , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Kyle Evans , Brad Smith , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Riku Voipio , Stacey Son , Richard Henderson Subject: [PULL 19/27] bsd-user: Add do_bsd_semop implementation Date: Sun, 1 Mar 2026 21:21:07 -0700 Message-ID: <20260302042115.83410-20-imp@bsdimp.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260302042115.83410-1-imp@bsdimp.com> References: <20260302042115.83410-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=2607:f8b0:4864:20::32f; envelope-from=imp@bsdimp.com; helo=mail-ot1-x32f.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @bsdimp-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1772425430833158500 Content-Type: text/plain; charset="utf-8" From: Stacey Son Add implementation of semop(2) syscall to perform System V semaphore operations. Converts target sembuf array to host format and executes operations. Signed-off-by: Stacey Son Reviewed-by: Richard Henderson Signed-off-by: Warner Losh --- bsd-user/bsd-misc.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/bsd-user/bsd-misc.h b/bsd-user/bsd-misc.h index 3dffb977a5..e1e552b58f 100644 --- a/bsd-user/bsd-misc.h +++ b/bsd-user/bsd-misc.h @@ -77,6 +77,28 @@ static inline abi_long do_bsd_semget(abi_long key, int n= sems, target_to_host_bitmask(target_flags, ipc_flags_tbl))); } =20 +/* semop(2) */ +static inline abi_long do_bsd_semop(int semid, abi_long ptr, unsigned nsop= s) +{ + g_autofree struct sembuf *sops =3D g_malloc(nsops * sizeof(struct semb= uf)); + struct target_sembuf *target_sembuf; + int i; + + target_sembuf =3D lock_user(VERIFY_READ, ptr, + nsops * sizeof(struct target_sembuf), 1); + if (target_sembuf =3D=3D NULL) { + return -TARGET_EFAULT; + } + for (i =3D 0; i < nsops; i++) { + __get_user(sops[i].sem_num, &target_sembuf[i].sem_num); + __get_user(sops[i].sem_op, &target_sembuf[i].sem_op); + __get_user(sops[i].sem_flg, &target_sembuf[i].sem_flg); + } + unlock_user(target_sembuf, ptr, 0); + + return semop(semid, sops, nsops); +} + /* getdtablesize(2) */ static inline abi_long do_bsd_getdtablesize(void) { --=20 2.52.0