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Sun, 08 Feb 2026 11:26:34 -0800 (PST) From: Warner Losh Date: Sun, 08 Feb 2026 12:26:17 -0700 Subject: [PATCH v2 08/24] bsd-user: Add host_to_target_semarray for semaphore operations MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260208-bsd-user-claude-v2-8-58e5fcfdb84f@bsdimp.com> References: <20260208-bsd-user-claude-v2-0-58e5fcfdb84f@bsdimp.com> In-Reply-To: <20260208-bsd-user-claude-v2-0-58e5fcfdb84f@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 X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1490; i=imp@bsdimp.com; h=from:subject:message-id; bh=KKOm1kO5SVw1eTG/QWkq8m52uXQzMN2XHbqGE7/xmA8=; b=owEBbQKS/ZANAwAKAWwc0Sh9sBEAAcsmYgBpiONgN1AkxuLeoPJF6UvGWY2wzYQNIXJEzCo5e Ox4rq2RugGJAjMEAAEKAB0WIQQgNfiUsAqjz3zN4bdsHNEofbARAAUCaYjjYAAKCRBsHNEofbAR AF6ED/oCcNDMSqqWFYM8GLItpiuF85fbv+Ntf4mc36oE8Ti9Jdvpt6dJxnPBo5cxqhVD4K9shEo 6zvOLy1v213zDTSDR9ATE48kDU0sIMZmiuU+ghG0Ms3LJu6jc9dhXTumO0Q8gJfSDef8IHl7WK9 5PP0tEfwAK7ZqDCWkVxqiiwjTtak0KruaFPYtq3z6T7GDffMZECU4NOBXuiLGcSd3GWkeBp5Wns Ac2WZIMJjMJO5KnNwpdMnszbxfh9g7VF57ml5nKrUL7sMsnJ2Aa+O+Joic+EUWOV4k5cpwm+Rpb PEExGv0ovYoLAremEgrokSq4CaRae7cE8lcv2r6dRN7UXEu4ptG9gPuyMgEKTS8sV5iprYw0963 tZNizcl3CnIbIOq9sT34A7309qnDuFSQ29YZb6WYMLK96TxtDqPOOFIQA/MQRKiowVYEELhV/Ky jyjoZnt0aFoY4z4i3Td+udSoKSmbYmPEJKeRXqUf8NEhx4CSifJr57hy41NNYgB2cat20OAtDe6 1ox2g+4IjY+pC2/L+048uLRWp/qUc53PEt6dB8Erosetq7cPBKfKSH5zum5ab8EzrLgTVbAcp72 8oR5wRKe8C2iw8zCPiX1zGjf+codJ1HJg6wQhaDYA+8RusUFXGq/pLpEVq2DBuVy3iHEt3BfWUb VuS2eQ4hcOO/UmA== 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::c2c; envelope-from=imp@bsdimp.com; helo=mail-oo1-xc2c.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: 1770578953479154100 From: Stacey Son Add host_to_target_semarray() to convert host semaphore array to target format for semctl(2) GETALL operations. Signed-off-by: Stacey Son Signed-off-by: Warner Losh Reviewed-by: Richard Henderson --- bsd-user/bsd-misc.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/bsd-user/bsd-misc.c b/bsd-user/bsd-misc.c index d9eb87db80..677cb49d27 100644 --- a/bsd-user/bsd-misc.c +++ b/bsd-user/bsd-misc.c @@ -79,3 +79,36 @@ abi_long target_to_host_semarray(int semid, unsigned sho= rt **host_array, =20 return 0; } + +abi_long host_to_target_semarray(int semid, abi_ulong target_addr, + unsigned short **host_arrayp) +{ + g_autofree unsigned short *host_array =3D *host_arrayp; + abi_long ret; + int nsems, i; + unsigned short *array; + union semun semun; + struct semid_ds semid_ds; + + semun.buf =3D &semid_ds; + + ret =3D semctl(semid, 0, IPC_STAT, semun); + if (ret =3D=3D -1) { + free(host_array); + return get_errno(ret); + } + + nsems =3D semid_ds.sem_nsems; + array =3D (unsigned short *)lock_user(VERIFY_WRITE, target_addr, + nsems * sizeof(unsigned short), 0); + if (array =3D=3D NULL) { + free(host_array); + return -TARGET_EFAULT; + } + for (i =3D 0; i < nsems; i++) { + __put_user(array[i], host_array + i); + } + free(host_array); + unlock_user(array, target_addr, 1); + return 0; +} --=20 2.52.0