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authorUlrich Drepper <drepper@redhat.com>1997-05-01 01:25:40 +0000
committerUlrich Drepper <drepper@redhat.com>1997-05-01 01:25:40 +0000
commit93256cc1acaefb4c3ae0c13c5b979b298ba66279 (patch)
tree4d7abffa8bb98407bd0da791bea478c85982621e /sysdeps
parent779ae82ecdf88b7ed7c1f00d3ed3a639671c3c8d (diff)
downloadglibc-93256cc1acaefb4c3ae0c13c5b979b298ba66279.tar.gz
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>.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/libm-ieee754/s_cexp.c15
-rw-r--r--sysdeps/unix/sysv/linux/shmat.c3
2 files changed, 17 insertions, 1 deletions
diff --git a/sysdeps/libm-ieee754/s_cexp.c b/sysdeps/libm-ieee754/s_cexp.c
index 3181af08c7..6ba5b0a4a5 100644
--- a/sysdeps/libm-ieee754/s_cexp.c
+++ b/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;
diff --git a/sysdeps/unix/sysv/linux/shmat.c b/sysdeps/unix/sysv/linux/shmat.c
index 2ac07f21d0..070b00c30f 100644
--- a/sysdeps/unix/sysv/linux/shmat.c
+++ b/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);
}