[PATCH 22/22] Add stubs for vadvise(), sbrk() and sstk()

[Karim Taha]

From: Stacey Son <s...@freebsd.org>

The above system calls are not supported by qemu.

Signed-off-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Karim Taha <kariem.taha...@gmail.com>
---
 bsd-user/bsd-mem.h            | 21 +++++++++++++++++++++
 bsd-user/freebsd/os-syscall.c | 12 ++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/bsd-user/bsd-mem.h b/bsd-user/bsd-mem.h
index f737b94885..274178bef7 100644
--- a/bsd-user/bsd-mem.h
+++ b/bsd-user/bsd-mem.h
@@ -407,4 +407,25 @@ static inline abi_long do_bsd_shmdt(abi_ulong shmaddr)
     return get_errno(shmdt(g2h_untagged(shmaddr)));
 }
 
+static inline abi_long do_bsd_vadvise(void)
+{
+    /* See sys_ovadvise() in vm_unix.c */
+    qemu_log("qemu: Unsupported syscall vadvise()\n");
+    return -TARGET_ENOSYS;
+}
+
+static inline abi_long do_bsd_sbrk(void)
+{
+    /* see sys_sbrk() in vm_mmap.c */
+    qemu_log("qemu: Unsupported syscall sbrk()\n");
+    return -TARGET_ENOSYS;
+}
+
+static inline abi_long do_bsd_sstk(void)
+{
+    /* see sys_sstk() in vm_mmap.c */
+    qemu_log("qemu: Unsupported syscall sstk()\n");
+    return -TARGET_ENOSYS;
+}
+
 #endif /* BSD_USER_BSD_MEM_H */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index f76bc1eb38..cf4b894fee 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -567,6 +567,18 @@ 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
          */
-- 
2.40.0