48 lines
2.2 KiB
C
48 lines
2.2 KiB
C
/* This file is part of GDB, the GNU debugger.
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Copyright 2008-2015 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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int main(void)
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{
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unsigned long tmp, cond;
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unsigned long dword = 0;
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/* Test that we can step over ldxr/stxr. This sequence should step from
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ldxr to the following __asm __volatile. */
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__asm __volatile ("1: ldxr %0,%2\n" \
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" cmp %0,#1\n" \
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" b.eq out\n" \
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" add %0,%0,1\n" \
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" stxr %w1,%0,%2\n" \
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" cbnz %w1,1b" \
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: "=&r" (tmp), "=&r" (cond), "+Q" (dword) \
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: : "memory");
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/* This sequence should take the conditional branch and step from ldxr
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to the return dword line. */
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__asm __volatile ("1: ldxr %0,%2\n" \
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" cmp %0,#1\n" \
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" b.eq out\n" \
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" add %0,%0,1\n" \
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" stxr %w1,%0,%2\n" \
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" cbnz %w1,1b\n" \
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: "=&r" (tmp), "=&r" (cond), "+Q" (dword) \
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: : "memory");
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dword = -1;
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__asm __volatile ("out:\n");
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return dword;
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}
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