linux-user: Handle TIOCSTART and TIOCSTOP

Some architectures (ppc, alpha, sparc, parisc, sh and xtensa) define the
BSD TIOCSTART and TIOCSTOP ioctls in their kernel headers to provide
compatibility to other operating systems.

Those ioctls are not implemented in Linux, nevertheless, bash will use
this ioctl if it's available on those architectures.

To avoid false warnings, add code to simply ignore those ioctls.

Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20161206152403.GA6651@ls3530>
Signed-off-by: Richard Henderson <rth@twiddle.net>

diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 1bad701481a2a0b308b23d0e739554d2c61968d4..eaf6fe61b07df64ba77ce1cb3d532cd00d1bf5ba 100644 (file)
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -422,3 +422,8 @@
                 MK_PTR(MK_STRUCT(STRUCT_rtentry)))
   IOCTL_SPECIAL(SIOCDELRT, IOC_W, do_ioctl_rt,
                 MK_PTR(MK_STRUCT(STRUCT_rtentry)))
+
+#ifdef TARGET_TIOCSTART
+  IOCTL_IGNORE(TIOCSTART)
+  IOCTL_IGNORE(TIOCSTOP)
+#endif

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 7b77503f94f4fe28f2ed20c25dde205a5f68366b..acb004f035cfe3cea35889de529dec7414d01f0d 100644 (file)
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5453,6 +5453,8 @@ static IOCTLEntry ioctl_entries[] = {
     { TARGET_ ## cmd, cmd, #cmd, access, 0, {  __VA_ARGS__ } },
 #define IOCTL_SPECIAL(cmd, access, dofn, ...)                      \
     { TARGET_ ## cmd, cmd, #cmd, access, dofn, {  __VA_ARGS__ } },
+#define IOCTL_IGNORE(cmd) \
+    { TARGET_ ## cmd, 0, #cmd },
 #include "ioctls.h"
     { 0, 0, },
 };
@@ -5484,6 +5486,10 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
 #endif
     if (ie->do_ioctl) {
         return ie->do_ioctl(ie, buf_temp, fd, cmd, arg);
+    } else if (!ie->host_cmd) {
+        /* Some architectures define BSD ioctls in their headers
+           that are not implemented in Linux.  */
+        return -TARGET_ENOSYS;
     }
 
     switch(arg_type[0]) {