1/* This file is part of GDB, the GNU debugger. 2 3 Copyright 2008-2023 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18int main(void) 19{ 20 unsigned long tmp, cond; 21 unsigned long dword = 0; 22 23 /* Test that we can step over ldxr/stxr. This sequence should step from 24 ldxr to the following __asm __volatile. */ 25 __asm __volatile ("1: ldxr %0,%2\n" \ 26 " cmp %0,#1\n" \ 27 " b.eq out\n" \ 28 " add %0,%0,1\n" \ 29 " stxr %w1,%0,%2\n" \ 30 " cbnz %w1,1b" \ 31 : "=&r" (tmp), "=&r" (cond), "+Q" (dword) \ 32 : : "memory"); 33 34 /* This sequence should take the conditional branch and step from ldxr 35 to the return dword line. */ 36 __asm __volatile ("1: ldxr %0,%2\n" \ 37 " cmp %0,#1\n" \ 38 " b.eq out\n" \ 39 " add %0,%0,1\n" \ 40 " stxr %w1,%0,%2\n" \ 41 " cbnz %w1,1b\n" \ 42 : "=&r" (tmp), "=&r" (cond), "+Q" (dword) \ 43 : : "memory"); 44 45 dword = -1; 46__asm __volatile ("out:\n"); 47 return dword; 48} 49