1997-05-01 03:13 Ulrich Drepper <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/shmat.c (shmat): For Linux-2.0 and up the
	kernel can return negative values.  Only fail when return value is
	in range in range which is never returned as valid address.
	Patch by Bruno Haible <haible@ilog.fr>.

ChangeLog

@@ -1,3 +1,10 @@
+1997-05-01 03:13  Ulrich Drepper  <drepper@cygnus.com>
+
+	* sysdeps/unix/sysv/linux/shmat.c (shmat): For Linux-2.0 and up the
+	kernel can return negative values.  Only fail when return value is
+	in range in range which is never returned as valid address.
+	Patch by Bruno Haible <haible@ilog.fr>.
+
 1997-04-30 17:35  Ulrich Drepper  <drepper@cygnus.com>
 
 	* math/libm-test.c: Implement test for exceptions.

sysdeps/libm-ieee754/s_cexp.c

@@ -19,6 +19,7 @@
    Boston, MA 02111-1307, USA.  */
 
 #include <complex.h>
+#include <fenv.h>
 #include <math.h>
 
 #include "math_private.h"
@@ -59,6 +60,10 @@ __cexp (__complex__ double x)
 	     is not +-inf the result is NaN + iNaN.  */
 	  __real__ retval = __nan ("");
 	  __imag__ retval = __nan ("");
+
+#ifdef FE_INVALID
+	  feraiseexcept (FE_INVALID);
+#endif
 	}
     }
   else if (rcls == FP_INFINITE)
@@ -89,6 +94,11 @@ __cexp (__complex__ double x)
 	{
 	  __real__ retval = HUGE_VAL;
 	  __imag__ retval = __nan ("");
+
+#ifdef FE_INVALID
+	  if (icls == FP_INFINITE)
+	    feraiseexcept (FE_INVALID);
+#endif
 	}
       else
 	{
@@ -101,6 +111,11 @@ __cexp (__complex__ double x)
       /* If the real part is NaN the result is NaN + iNaN.  */
       __real__ retval = __nan ("");
       __imag__ retval = __nan ("");
+
+#ifdef FE_INVALID
+      if (rcls != FP_NAN || icls != FP_NAN)
+	feraiseexcept (FE_INVALID);
+#endif
     }
 
   return retval;

sysdeps/unix/sysv/linux/shmat.c

@@ -33,5 +33,6 @@ shmat (shmid, shmaddr, shmflg)
   unsigned long raddr;
 
   retval = __ipc (IPCOP_shmat, shmid, shmflg, (int) &raddr, shmaddr);
-  return retval < 0 ? (void *) retval : (void *) raddr;
+  return ((unsigned long int) retval > -(unsigned long int) SHMLBA
+	  ? (void *) retval : (void *) raddr);
 }