commit 0f6b4d21121bec70b383b4a3bc1c46d9c83f8692
author Alexander Graf <agraf@suse.de> Tue Sep 27 14:39:42 2011 +0200
committer Riku Voipio <riku.voipio@linaro.org> Thu Oct 27 14:42:40 2011 +0300
tree 78d200a6f19a48b8f8e641a0d9448d9dcc84bb51
parent f4c690101c74afcc58deead71f6302fe343718b7

linux-user: implement reboot syscall

For OBS, we're running a full cross-guest inside of a VM. When a build
is done there, we reboot the guest as shutdown mechanism.

Unfortunately, reboot is not implemented in linux-user. So this mechanism
fails, spilling unpretty warnings. This patch implements sys_reboot()
emulation.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>

linux-user/syscall.c

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 6159571..9f5da36 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -248,6 +248,8 @@
 #define __NR_sys_sched_setaffinity __NR_sched_setaffinity
 _syscall3(int, sys_sched_setaffinity, pid_t, pid, unsigned int, len,
           unsigned long *, user_mask_ptr);
+_syscall4(int, reboot, int, magic1, int, magic2, unsigned int, cmd,
+          void *, arg);
 
 static bitmask_transtbl fcntl_flags_tbl[] = {
   { TARGET_O_ACCMODE,   TARGET_O_WRONLY,    O_ACCMODE,   O_WRONLY,    },
@@ -5872,7 +5874,11 @@
         break;
 #endif
     case TARGET_NR_reboot:
-        goto unimplemented;
+        if (!(p = lock_user_string(arg4)))
+            goto efault;
+        ret = reboot(arg1, arg2, arg3, p);
+        unlock_user(p, arg4, 0);
+        break;
 #ifdef TARGET_NR_readdir
     case TARGET_NR_readdir:
         goto unimplemented;