diff options
Diffstat (limited to 'sysdeps/i386')
| -rw-r--r-- | sysdeps/i386/Makefile | 35 | ||||
| -rw-r--r-- | sysdeps/i386/i686/Makefile | 3 | ||||
| -rw-r--r-- | sysdeps/i386/i686/tst-stack-align.h | 45 |
3 files changed, 83 insertions, 0 deletions
diff --git a/sysdeps/i386/Makefile b/sysdeps/i386/Makefile index ba0d21f13f..56027703ce 100644 --- a/sysdeps/i386/Makefile +++ b/sysdeps/i386/Makefile @@ -20,3 +20,38 @@ CFLAGS-rtld.c += -Wno-uninitialized -Wno-unused CFLAGS-dl-load.c += -Wno-unused CFLAGS-dl-reloc.c += -Wno-unused endif + +# Most of the glibc routines don't ever call user defined callbacks +# nor use any FPU or SSE* and as such don't need bigger %esp alignment +# than 4 bytes. +# Lots of routines in math will use FPU, so make math subdir an exception +# here. +ifeq ($(subdir),math) +sysdep-CFLAGS += -mpreferred-stack-boundary=4 +else +ifeq ($(subdir),csu) +sysdep-CFLAGS += -mpreferred-stack-boundary=4 +else +sysdep-CFLAGS += -mpreferred-stack-boundary=2 +# Likewise, any function which calls user callbacks +uses-callbacks += -mpreferred-stack-boundary=4 +endif +endif + +# And a couple of other routines +ifeq ($(subdir),stdlib) +CFLAGS-exit.c += -mpreferred-stack-boundary=4 +endif +ifeq ($(subdir),elf) +CFLAGS-dl-init.c += -mpreferred-stack-boundary=4 +CFLAGS-dl-fini.c += -mpreferred-stack-boundary=4 +CFLAGS-dl-open.c += -mpreferred-stack-boundary=4 +CFLAGS-dl-close.c += -mpreferred-stack-boundary=4 +CFLAGS-dl-error.c += -mpreferred-stack-boundary=4 +endif +ifeq ($(subdir),dlfcn) +CFLAGS-dlopen.c += -mpreferred-stack-boundary=4 +CFLAGS-dlopenold.c += -mpreferred-stack-boundary=4 +CFLAGS-dlclose.c += -mpreferred-stack-boundary=4 +CFLAGS-dlerror.c += -mpreferred-stack-boundary=4 +endif diff --git a/sysdeps/i386/i686/Makefile b/sysdeps/i386/i686/Makefile index b85167fe4d..e9ac505e78 100644 --- a/sysdeps/i386/i686/Makefile +++ b/sysdeps/i386/i686/Makefile @@ -2,3 +2,6 @@ ifeq ($(subdir),csu) sysdep_routines += hp-timing static-only-routines += hp-timing endif + +# So that we can test __m128's alignment +stack-align-test-flags += -msse -mpreferred-stack-boundary=4 diff --git a/sysdeps/i386/i686/tst-stack-align.h b/sysdeps/i386/i686/tst-stack-align.h new file mode 100644 index 0000000000..e1894c65ec --- /dev/null +++ b/sysdeps/i386/i686/tst-stack-align.h @@ -0,0 +1,45 @@ +/* Copyright (C) 2003 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> +#ifndef __SSE__ +#include_next <tst-stack-align.h> +#else +#include <xmmintrin.h> + +#define TEST_STACK_ALIGN() \ + ({ \ + __m128 _m; \ + double _d = 12.0; \ + long double _ld = 15.0; \ + int _ret = 0; \ + printf ("__m128: %p %zu\n", &_m, __alignof (__m128)); \ + if ((((uintptr_t) &_m) & (__alignof (__m128) - 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; \ + }) +#endif |