bsd-user: Add stubs for vadvise(), sbrk() and sstk()

The above system calls are not supported by qemu.

Signed-off-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230925182709.4834-24-kariem.taha2.7@gmail.com>

bsd-user/bsd-mem.h

@@ -431,4 +431,22 @@ static inline abi_long do_bsd_shmdt(abi_ulong shmaddr)
     return ret;
 }
 
+static inline abi_long do_bsd_vadvise(void)
+{
+    /* See sys_ovadvise() in vm_unix.c */
+    return -TARGET_EINVAL;
+}
+
+static inline abi_long do_bsd_sbrk(void)
+{
+    /* see sys_sbrk() in vm_mmap.c */
+    return -TARGET_EOPNOTSUPP;
+}
+
+static inline abi_long do_bsd_sstk(void)
+{
+    /* see sys_sstk() in vm_mmap.c */
+    return -TARGET_EOPNOTSUPP;
+}
+
 #endif /* BSD_USER_BSD_MEM_H */

bsd-user/freebsd/os-syscall.c

@@ -879,6 +879,18 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_bsd_shmdt(arg1);
         break;
 
+    case TARGET_FREEBSD_NR_freebsd11_vadvise:
+        ret = do_bsd_vadvise();
+        break;
+
+    case TARGET_FREEBSD_NR_sbrk:
+        ret = do_bsd_sbrk();
+        break;
+
+    case TARGET_FREEBSD_NR_sstk:
+        ret = do_bsd_sstk();
+        break;
+
         /*
          * Misc
          */