kosaki	2011-01-12 23:11:06 +0900 (Wed, 12 Jan 2011)

  New Revision: 30525

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=30525

  Log:
    * io.c (rb_f_syscall): Add 64bit Linux support. Some syscall takes
      long type arguments.

  Modified files:
    trunk/ChangeLog
    trunk/io.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 30524)
+++ ChangeLog	(revision 30525)
@@ -1,3 +1,8 @@
+Wed Jan 12 23:55:48 2011  KOSAKI Motohiro  <kosaki.motohiro@g...>
+
+	* io.c (rb_f_syscall): Add 64bit Linux support. Some syscall takes
+	  long type arguments.
+
 Wed Jan 12 19:37:10 2011  Tanaka Akira  <akr@f...>
 
 	* vm_dump.c: parenthesize macro arguments.
Index: io.c
===================================================================
--- io.c	(revision 30524)
+++ io.c	(revision 30525)
@@ -7839,6 +7839,18 @@
 # else
 #  error ---->> it is asserted that __syscall takes the first argument and returns retval in 64bit signed integer. <<----
 # endif
+#elif defined linux
+# define SYSCALL syscall
+# define NUM2SYSCALLID(x) NUM2LONG(x)
+# define RETVAL2NUM(x) LONG2NUM(x)
+    /*
+     * Linux man page says, syscall(2) function prototype is below.
+     *
+     *     int syscall(int number, ...);
+     *
+     * But, it's incorrect. Actual one takes and returned long. (see unistd.h)
+     */
+    long num, retval = -1;
 #else
 # define SYSCALL syscall
 # define NUM2SYSCALLID(x) NUM2INT(x)

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