Test for stack alignment.

linuxthreads/tst-align.c

@@ -0,0 +1,71 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <pthread.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <tst-stack-align.h>
+
+static void *
+tf (void *arg)
+{
+  bool ok = true;
+
+  puts ("in thread");
+
+  if (TEST_STACK_ALIGN ())
+    ok = false;
+
+  return ok ? NULL : (void *) -1l;
+}
+
+static int
+do_test (void)
+{
+  bool ok = true;
+
+  puts ("in main");
+
+  if (TEST_STACK_ALIGN ())
+    ok = false;
+
+  pthread_t th;
+  if (pthread_create (&th, NULL, tf, NULL) != 0)
+    {
+      puts ("create failed");
+      return 1;
+    }
+
+  void *res;
+  if (pthread_join (th, &res) != 0)
+    {
+      puts ("join failed");
+      return 1;
+    }
+
+  if (res != NULL)
+    ok = false;
+
+  return ok ? 0 : 1;
+}
+
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"

misc/qefgcvt_r.c

@@ -24,6 +24,7 @@
 #define FUNC_PREFIX q
 #define FLOAT_FMT_FLAG "L"
 #define FLOAT_NAME_EXT l
+#define FLOAT_MIN_10_EXP LDBL_MIN_10_EXP
 #if LDBL_MANT_DIG == 64
 # define NDIGIT_MAX 21
 #elif LDBL_MANT_DIG == 53
@@ -40,5 +41,16 @@
 # error "NDIGIT_MAX must be precomputed"
 # define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
 #endif
+#if LDBL_MIN_10_EXP == -37
+# define FLOAT_MIN_10_NORM	1.0e-37L
+#elif LDBL_MIN_10_EXP == -307
+# define FLOAT_MIN_10_NORM	1.0e-307L
+#elif LDBL_MIN_10_EXP == -4931
+# define FLOAT_MIN_10_NORM	1.0e-4931L
+#else
+/* libc can't depend on libm.  */
+# error "FLOAT_MIN_10_NORM must be precomputed"
+# define FLOAT_MIN_10_NORM	exp10l (LDBL_MIN_10_EXP)
+#endif
 
 #include "efgcvt_r.c"

misc/tst-efgcvt.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1998, 1999, 2000, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -20,6 +20,7 @@
 # define _GNU_SOURCE	1
 #endif
 
+#include <float.h>
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -59,6 +60,10 @@ static testcase ecvt_tests[] =
   { 123.01, -4, 3, "" },
   { 126.71, -4, 3, "" },
   { 0.0, 4, 1, "0000" },
+#if DBL_MANT_DIG == 53
+  { 0x1p-1074, 3, -323, "494" },
+  { -0x1p-1074, 3, -323, "494" },
+#endif
   /* -1.0 is end marker.  */
   { -1.0, 0, 0, "" }
 };

nptl/Makefile

@@ -205,7 +205,7 @@ tests = tst-attr1 tst-attr2 tst-attr3 \
 	tst-sem1 tst-sem2 tst-sem3 tst-sem4 tst-sem5 tst-sem6 tst-sem7 \
 	tst-sem8 tst-sem9 \
 	tst-barrier1 tst-barrier2 tst-barrier3 tst-barrier4 \
-	tst-align \
+	tst-align tst-align2 \
 	tst-basic1 tst-basic2 tst-basic3 tst-basic4 tst-basic5 tst-basic6 \
 	tst-kill1 tst-kill2 tst-kill3 tst-kill4 tst-kill5 tst-kill6 \
 	tst-raise1 \

nptl/sysdeps/i386/Makefile

@@ -22,4 +22,6 @@ endif
 
 ifeq ($(subdir),nptl)
 CFLAGS-pthread_create.c += -mpreferred-stack-boundary=4
+CFLAGS-tst-align.c += -mpreferred-stack-boundary=4
+CFLAGS-tst-align2.c += -mpreferred-stack-boundary=4
 endif

nptl/sysdeps/i386/tls.h

@@ -397,9 +397,12 @@ union user_desc_init
 #define CALL_THREAD_FCT(descr) \
   ({ void *__res;							      \
      int __ignore1, __ignore2;						      \
-     asm volatile ("pushl %%gs:%P4\n\t"					      \
+     asm volatile ("pushl %%eax\n\t"					      \
+		   "pushl %%eax\n\t"					      \
+		   "pushl %%eax\n\t"					      \
+		   "pushl %%gs:%P4\n\t"					      \
 		   "call *%%gs:%P3\n\t"					      \
-		   "addl $4, %%esp"					      \
+		   "addl $16, %%esp"					      \
 		   : "=a" (__res), "=c" (__ignore1), "=d" (__ignore2)	      \
 		   : "i" (offsetof (struct pthread, start_routine)),	      \
 		     "i" (offsetof (struct pthread, arg)));		      \

nptl/tst-align2.c

@@ -0,0 +1,87 @@
+/* Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <sched.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <tst-stack-align.h>
+
+static int
+f (void *arg)
+{
+  bool ok = true;
+
+  if (TEST_STACK_ALIGN ())
+    ok = false;
+
+  return ok ? 0 : 1;
+}
+
+static int
+do_test (void)
+{
+  bool ok = true;
+
+  puts ("in main");
+
+  if (TEST_STACK_ALIGN ())
+    ok = false;
+
+#ifdef __ia64__
+  extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base,
+		       size_t __child_stack_size, int __flags,
+		       void *__arg, ...);
+  char st[256 * 1024];
+  pid_t p = __clone2 (f, st, sizeof (st), 0, 0);
+#else
+  char st[128 * 1024];
+  pid_t p = clone (f, st + sizeof (st), 0, 0);
+#endif
+  if (p == -1)
+    {
+      printf("clone failed: %m\n");
+      return 1;
+    }
+
+  int e;
+  if (waitpid (p, &e, __WCLONE) != p)
+    {
+      puts ("waitpid failed");
+      kill (p, SIGKILL);
+      return 1;
+    }
+  if (!WIFEXITED (e))
+    {
+      if (WIFSIGNALED (e))
+	printf ("died from signal %s\n", strsignal (WTERMSIG (e)));
+      else
+	puts ("did not terminate correctly");
+      return 1;
+    }
+  if (WEXITSTATUS (e) != 0)
+    ok = false;
+
+  return ok ? 0 : 1;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"

sysdeps/i386/tst-stack-align.h

@@ -0,0 +1,42 @@
+/* Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio.h>
+#include <stdint.h>
+
+typedef struct { int i[4]; } int_al16 __attribute__((aligned (16)));
+
+#define TEST_STACK_ALIGN() \
+  ({									     \
+    int_al16 _m;							     \
+    double _d = 12.0;							     \
+    long double _ld = 15.0;						     \
+    int _ret = 0;							     \
+    printf ("int_al16:  %p %zu\n", &_m, __alignof (int_al16));		     \
+    if ((((uintptr_t) &_m) & (__alignof (int_al16) - 1)) != 0)		     \
+      _ret = 1;								     \
+									     \
+    printf ("double:  %g %p %zu\n", _d, &_d, __alignof (double));	     \
+    if ((((uintptr_t) &_d) & (__alignof (double) - 1)) != 0)		     \
+      _ret = 1;								     \
+									     \
+    printf ("ldouble: %Lg %p %zu\n", _ld, &_ld, __alignof (long double));    \
+    if ((((uintptr_t) &_ld) & (__alignof (long double) - 1)) != 0)	     \
+      _ret = 1;								     \
+    _ret;								     \
+    })

sysdeps/unix/sysv/linux/i386/clone.S

@@ -67,7 +67,7 @@ ENTRY (BP_SYM (__clone))
 	/* Insert the argument onto the new stack.  Make sure the new
 	   thread is started with an alignment of (mod 16).  */
 	andl	$0xfffffff0, %ecx
-	subl	$24,%ecx
+	subl	$28,%ecx
 	movl	ARG(%esp),%eax		/* no negative argument counts */
 	movl	%eax,12(%ecx)