tests: rewrite sigreturn syscall decoding check from match_grep to match_diff

[strace] / userfaultfd.c

diff --git a/userfaultfd.c b/userfaultfd.c
index 7f8e3e4663258564fe66ba806b950631c1982700..aeeb3eabc663defccd5cda3081195630268b795f 100644 (file)
--- a/userfaultfd.c
+++ b/userfaultfd.c
@@ -1,3 +1,30 @@
+/*
+ * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
 #include "defs.h"
 #include <fcntl.h>
 
@@ -9,3 +36,124 @@ SYS_FUNC(userfaultfd)
 
        return RVAL_DECODED | RVAL_FD;
 }
+
+#ifdef HAVE_LINUX_USERFAULTFD_H
+# include <linux/ioctl.h>
+# include <linux/userfaultfd.h>
+
+# include "xlat/uffd_api_flags.h"
+# include "xlat/uffd_copy_flags.h"
+# include "xlat/uffd_register_ioctl_flags.h"
+# include "xlat/uffd_register_mode_flags.h"
+# include "xlat/uffd_zeropage_flags.h"
+
+static void
+tprintf_uffdio_range(const struct uffdio_range *range)
+{
+       tprintf("{start=%#" PRI__x64 ", len=%#" PRI__x64 "}",
+               range->start, range->len);
+}
+
+int
+uffdio_ioctl(struct tcb *const tcp, const unsigned int code,
+            const kernel_ulong_t arg)
+{
+       switch (code) {
+       case UFFDIO_API: {
+               struct uffdio_api ua;
+               if (entering(tcp)) {
+                       tprints(", ");
+                       if (umove_or_printaddr(tcp, arg, &ua))
+                               return RVAL_DECODED | 1;
+                       /* Features is intended to contain some flags, but
+                        * there aren't any defined yet.
+                        */
+                       tprintf("{api=%#" PRI__x64
+                               ", features=%#" PRI__x64,
+                               ua.api, ua.features);
+               } else {
+                       if (!syserror(tcp) && !umove(tcp, arg, &ua)) {
+                               tprintf(", features.out=%#" PRI__x64
+                                       ", ioctls=", ua.features);
+                               printflags64(uffd_api_flags, ua.ioctls,
+                                            "_UFFDIO_???");
+                       }
+                       tprints("}");
+               }
+               return 1;
+       }
+
+       case UFFDIO_COPY: {
+               struct uffdio_copy uc;
+               if (entering(tcp)) {
+                       tprints(", ");
+                       if (umove_or_printaddr(tcp, arg, &uc))
+                               return RVAL_DECODED | 1;
+                       tprintf("{dst=%#" PRI__x64 ", src=%#" PRI__x64
+                               ", len=%#" PRI__x64 ", mode=",
+                               uc.dst, uc.src, uc.len);
+                       printflags64(uffd_copy_flags, uc.mode,
+                                    "UFFDIO_COPY_???");
+               } else {
+                       if (!syserror(tcp) && !umove(tcp, arg, &uc))
+                               tprintf(", copy=%#" PRI__x64, uc.copy);
+                       tprints("}");
+               }
+               return 1;
+       }
+
+       case UFFDIO_REGISTER: {
+               struct uffdio_register ur;
+               if (entering(tcp)) {
+                       tprints(", ");
+                       if (umove_or_printaddr(tcp, arg, &ur))
+                               return RVAL_DECODED | 1;
+                       tprints("{range=");
+                       tprintf_uffdio_range(&ur.range);
+                       tprints(", mode=");
+                       printflags64(uffd_register_mode_flags, ur.mode,
+                                    "UFFDIO_REGISTER_MODE_???");
+               } else {
+                       if (!syserror(tcp) && !umove(tcp, arg, &ur)) {
+                               tprints(", ioctls=");
+                               printflags64(uffd_register_ioctl_flags,
+                                            ur.ioctls, "UFFDIO_???");
+                       }
+                       tprints("}");
+               }
+               return 1;
+       }
+
+       case UFFDIO_UNREGISTER:
+       case UFFDIO_WAKE: {
+               struct uffdio_range ura;
+               tprints(", ");
+               if (!umove_or_printaddr(tcp, arg, &ura))
+                       tprintf_uffdio_range(&ura);
+               return RVAL_DECODED | 1;
+       }
+
+       case UFFDIO_ZEROPAGE: {
+               struct uffdio_zeropage uz;
+               if (entering(tcp)) {
+                       tprints(", ");
+                       if (umove_or_printaddr(tcp, arg, &uz))
+                               return RVAL_DECODED | 1;
+                       tprints("{range=");
+                       tprintf_uffdio_range(&uz.range);
+                       tprints(", mode=");
+                       printflags64(uffd_zeropage_flags, uz.mode,
+                                    "UFFDIO_ZEROPAGE_???");
+               } else {
+                       if (!syserror(tcp) && !umove(tcp, arg, &uz))
+                               tprintf(", zeropage=%#" PRI__x64, uz.zeropage);
+                       tprints("}");
+               }
+               return 1;
+       }
+
+       default:
+               return RVAL_DECODED;
+       }
+}
+#endif /* HAVE_LINUX_USERFAULTFD_H */