commit f28a1e4bab4cfdd067bde3d958529575aa8e8f6b
author Stacey Son <sson@FreeBSD.org> Mon Sep 25 21:27:00 2023 +0300
committer Warner Losh <imp@bsdimp.com> Tue Oct 03 17:14:07 2023 -0600
tree 698aa4885aac17151ba56a2fc0ade312753a83d3
parent ecbe22494d970b7811a1764d2f98e083b02f73d0

bsd-user: Implement msync(2)

Co-authored-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230925182709.4834-15-kariem.taha2.7@gmail.com>

bsd-user/bsd-mem.h

diff --git a/bsd-user/bsd-mem.h b/bsd-user/bsd-mem.h
index 0f9e4a1..5e88582 100644
--- a/bsd-user/bsd-mem.h
+++ b/bsd-user/bsd-mem.h
@@ -88,4 +88,15 @@
     return get_errno(target_mprotect(arg1, arg2, arg3));
 }
 
+/* msync(2) */
+static inline abi_long do_bsd_msync(abi_long addr, abi_long len, abi_long flags)
+{
+    if (!guest_range_valid_untagged(addr, len)) {
+        /* It seems odd, but POSIX wants this to be ENOMEM */
+        return -TARGET_ENOMEM;
+    }
+
+    return get_errno(msync(g2h_untagged(addr), len, flags));
+}
+
 #endif /* BSD_USER_BSD_MEM_H */

bsd-user/freebsd/os-syscall.c

diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index 2d8f1a9..2525e0b 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -811,6 +811,10 @@
         ret = do_bsd_mprotect(arg1, arg2, arg3);
         break;
 
+    case TARGET_FREEBSD_NR_msync: /* msync(2) */
+        ret = do_bsd_msync(arg1, arg2, arg3);
+        break;
+
 #if defined(__FreeBSD_version) && __FreeBSD_version >= 1300048
     case TARGET_FREEBSD_NR_shm_open2: /* shm_open2(2) */
         ret = do_freebsd_shm_open2(arg1, arg2, arg3, arg4, arg5);