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79aec84102
1. Replace
if ((((uintptr_t) &_d) & (__alignof (double) - 1)) != 0)
which may be optimized out by compiler, with
int
__attribute__ ((weak, noclone, noinline))
is_aligned (void *p, int align)
{
return (((uintptr_t) p) & (align - 1)) != 0;
}
2. Add TEST_STACK_ALIGN_INIT to TEST_STACK_ALIGN.
3. Add a common TEST_STACK_ALIGN_INIT to check 16-byte stack alignment
for both i386 and x86-64.
4. Update powerpc to use TEST_STACK_ALIGN_INIT.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
34 lines
1.4 KiB
C
34 lines
1.4 KiB
C
/* Check stack alignment. PowerPC version.
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Copyright (C) 2005-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define TEST_STACK_ALIGN_INIT() \
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({ \
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/* Altivec __vector int etc. needs 16byte aligned stack. \
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Instead of using altivec.h here, use aligned attribute instead. */ \
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struct _S \
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{ \
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int _i __attribute__((aligned (16))); \
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int _j[3]; \
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} _s = { ._i = 18, ._j[0] = 19, ._j[1] = 20, ._j[2] = 21 }; \
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printf ("__vector int: { %d, %d, %d, %d } %p %zu\n", _s._i, _s._j[0], \
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_s._j[1], _s._j[2], &_s, __alignof (_s)); \
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is_aligned (&_s, __alignof (_s)); \
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})
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#include_next <tst-stack-align.h>
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