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Tue, 24 Feb 2026 06:40:50 -0800 (PST) From: Warner Losh Date: Tue, 24 Feb 2026 07:40:31 -0700 Subject: [PATCH v4 07/24] bsd-user: Add target_to_host_semarray for semaphore operations MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260224-bsd-user-claude-v4-7-8ee5ae17056f@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=1745; i=imp@bsdimp.com; h=from:subject:message-id; bh=eU3/9GcsUmR7R6CZ+cId5a+3Dosb9k3GJT2jhlhOAhM=; b=owEBbQKS/ZANAwAKAWwc0Sh9sBEAAcsmYgBpnbhnGN+YwNESLy8mJMwQDw8EPCVFiMa9plLKn MJ66fajW3uJAjMEAAEKAB0WIQQgNfiUsAqjz3zN4bdsHNEofbARAAUCaZ24ZwAKCRBsHNEofbAR AAMgD/9UbkE1D8oGSSjnHW92+bMITWaw3bKeLfOm5rh9uywdNJ545vR9FzFxgZSmnJPlnWxRUgs eXuXcx3XkHZn5GGKvbpaqLfd0MZ8rG2raklLzSVna9iogVoIXuubDw1QDB1jKhqJ8EzjPZ9Kdr9 xgmd1kuEEvtXUx3I1VahyabkvLaHoeZyjUEEs+ZubQ+QiNOcE3UWpU9MuAAe0FN25w2+Ur77/RK YKHitNl4zZkHwF1qBPeUts2GiTSaZ+dOqLlpYDDzbhdRDscbeXsaBe09cs5MUlK/Ybb3rK11hPI krSGd3EZ9P3MFxNg47oWyz7+PRhVynXDXIkbl30rrJ5bOiZzK8PL6GizsRBk6ar9acZM79mCNo9 FsNOnt0ZuwOZ8kl0PtOcNV39IxQR4m3nSxbHALhqLPVz9wOOP2tdt5LxeBQCccki8G4qmf6uR7y kE+U1VBh5G3nlrhygC2YBY+Tj+V6L5XLBcGFlHTPPSEh9P2smqOi5xtmPF4wE36/aFgallr8n30 uW0Rfr+3NW+R7ssyAR99xMvrxldzKhsmjOM5zzg4QdQYElfepOkCPCGLzx3NDmwxxH9EKOXhi0J eSxbFI0J0m5lsMnUN3eTjCMHCVBDRyD+972M7Ol41qMZz5b1zpWjYaKntZPH8XI5hUJ1v6FDxDU b8I7SEnOq13KhRg== 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: 1771944201008158500 From: Stacey Son Add target_to_host_semarray() to convert target semaphore array to host format for semctl(2) SETALL operations. Signed-off-by: Stacey Son Reviewed-by: Richard Henderson Signed-off-by: Warner Losh --- bsd-user/bsd-misc.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/bsd-user/bsd-misc.c b/bsd-user/bsd-misc.c index 68b67f37ba..d1645db46b 100644 --- a/bsd-user/bsd-misc.c +++ b/bsd-user/bsd-misc.c @@ -7,6 +7,11 @@ */ #include "qemu/osdep.h" =20 +#define _WANT_SEMUN +#include +#include +#include +#include #include =20 #include "qemu.h" @@ -33,3 +38,33 @@ abi_long host_to_target_uuid(abi_ulong target_addr, stru= ct uuid *host_uuid) unlock_user_struct(target_uuid, target_addr, 1); return 0; } + +abi_long target_to_host_semarray(int semid, unsigned short **host_array, + abi_ulong target_addr) +{ + 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) { + return get_errno(ret); + } + nsems =3D semid_ds.sem_nsems; + *host_array =3D g_new(unsigned short, nsems); + array =3D lock_user(VERIFY_READ, target_addr, + nsems * sizeof(unsigned short), 1); + if (array =3D=3D NULL) { + free(*host_array); + return -TARGET_EFAULT; + } + for (i =3D 0; i < nsems; i++) { + __get_user((*host_array)[i], array + i); + } + unlock_user(array, target_addr, 0); + + return 0; +} --=20 2.52.0