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

long type arguments.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30525 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Wed Jan 12 23:55:48 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* 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@fsij.org>
 
 	* vm_dump.c: parenthesize macro arguments.

io.c

@@ -7839,6 +7839,18 @@ rb_f_syscall(int argc, VALUE *argv)
 # 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)