From: Thomas Weißschuh <linux@weissschuh.net>
Date: Wed, 29 Oct 2025 16:02:52 +0000 (+0100)
Subject: tools/nolibc: handle 64-bit off_t for llseek
X-Git-Tag: v6.19-rc1~194^2~6
X-Git-Url: https://gentwo.org/gitweb/?a=commitdiff_plain;h=d93d0593dd65b8cd72d6dc9bda7fc4982fd65afb;p=linux%2F.git

tools/nolibc: handle 64-bit off_t for llseek

Correctly handle 64-bit off_t values in preparation for 64-bit off_t on
32-bit architectures.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Willy Tarreau <w@1wt.eu>
---

diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index fcc36cffad4d..2b186d1af52e 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -612,8 +612,7 @@ off_t sys_lseek(int fd, off_t offset, int whence)
 	off_t result;
 	int ret;
 
-	/* Only exists on 32bit where nolibc off_t is also 32bit */
-	ret = my_syscall5(__NR_llseek, fd, 0, offset, &loff, whence);
+	ret = my_syscall5(__NR_llseek, fd, offset >> 32, (uint32_t)offset, &loff, whence);
 	if (ret < 0)
 		result = ret;
 	else if (loff != (off_t)loff)