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| author | Ulrich Drepper <drepper@redhat.com> | 2004-12-22 20:09:42 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-12-22 20:09:42 +0000 |
| commit | 7d58530341304d403a6626d7f7a1913165fe2f32 (patch) | |
| tree | 471ef022d415c89ff4b5544a5e0239a9ac45d841 /sysdeps | |
| parent | ec8c29dc013a5e0ca3330ce5e4ae989e811491e6 (diff) | |
| download | glibc-7d58530341304d403a6626d7f7a1913165fe2f32.zip glibc-7d58530341304d403a6626d7f7a1913165fe2f32.tar.gz glibc-7d58530341304d403a6626d7f7a1913165fe2f32.tar.bz2 | |
Test for stack alignment.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/i386/tst-stack-align.h | 42 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/clone.S | 2 |
2 files changed, 43 insertions, 1 deletions
diff --git a/sysdeps/i386/tst-stack-align.h b/sysdeps/i386/tst-stack-align.h new file mode 100644 index 0000000..6297d9f --- /dev/null +++ b/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; \ + }) diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S index acd43df..c7d31f7 100644 --- a/sysdeps/unix/sysv/linux/i386/clone.S +++ b/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) |