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Tue, 24 Feb 2026 06:41:02 -0800 (PST) From: Warner Losh Date: Tue, 24 Feb 2026 07:40:41 -0700 Subject: [PATCH v4 17/24] bsd-user: Add do_bsd_semop implementation MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260224-bsd-user-claude-v4-17-8ee5ae17056f@bsdimp.com> References: <20260224-bsd-user-claude-v4-0-8ee5ae17056f@bsdimp.com> In-Reply-To: <20260224-bsd-user-claude-v4-0-8ee5ae17056f@bsdimp.com> To: qemu-devel@nongnu.org Cc: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Kyle Evans , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Riku Voipio , Warner Losh , Stacey Son , Richard Henderson X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1559; i=imp@bsdimp.com; h=from:subject:message-id; bh=mBs5Y0mZEl6PwncKqPNyZPiCKdK9StT+eagUv/bboAk=; b=owEBbQKS/ZANAwAKAWwc0Sh9sBEAAcsmYgBpnbhoqxGXE8bqmn6uZUzg6tyf2MNLpUcPGCEIE lJUgbSIafaJAjMEAAEKAB0WIQQgNfiUsAqjz3zN4bdsHNEofbARAAUCaZ24aAAKCRBsHNEofbAR AB+tD/4qkJMhl7YRzn/WrqW8NB34C4Tj7vwOWE/G4BUb3IH3vjTR795/UIUr8JHh7WrI6g7Q11l KecX6F7tnysOjg8tvROwPIaKvQUnE1oGZdXPM25V+n3W6D/nzum7Fta1r3SO17vajAfrzWvVg7L 9o+vk32/pui+cWcYimRM+wOJU9/h3eCGa+dKqypBCcCnuPKQUldJ+5AQqw0ZJVz3kZIP2Seu8Zg K99RSrpmhsHUkilQL2gt4GDCydRUBbKhbdOCwIYBMTVHf5+ksMccALT+DRl3+F3jynIAyQ4XMt4 JRET0dHEjFAMX5n2NHr+CpIPixQYyF3JBK5S7TWkZCc62G00imWTU/i30Q+U8tcijQzNn6fg03o 9IzIFoeBILhrDkB/oeptj4d0JGPDlVP9g48X0i0FBjqDNchJ7wsR82qo1GGZ4Zx4xWeaoHHvjtd XqaRrngax85d65YL3DFZAVL5ybPaMfJIDvVyxX3ApAR4RUxgexcHpi6JWMU9gpAjyqZJ+H+7Qp7 R4qP5L4Qg7PA7fGliWJl8UIzWL1wu+OCmSTLNH5R5JMGXrPJU6I0YWHW0jFgA5/7QHgO+yr5OzF oc7Jy3HQ1JrB2j15zsOyjPSPaPxwDkKWy3Z+sojf8jy2Rqo3osh80QTqJrjkdMgdW0p4Ka2p2N8 exxWtLpKwe/fVYw== X-Developer-Key: i=imp@bsdimp.com; a=openpgp; fpr=2035F894B00AA3CF7CCDE1B76C1CD1287DB01100 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::32a; envelope-from=imp@bsdimp.com; helo=mail-ot1-x32a.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: 1771944195008158500 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