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Linux/tools/testing/selftests/powerpc/alignment/copy_unaligned.c

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  1 /*
  2  * Copyright 2016, Chris Smart, IBM Corporation.
  3  *
  4  * This program is free software; you can redistribute it and/or
  5  * modify it under the terms of the GNU General Public License
  6  * as published by the Free Software Foundation; either version
  7  * 2 of the License, or (at your option) any later version.
  8  *
  9  * Calls to copy which are not 128-byte aligned should be caught
 10  * and sent a SIGBUS.
 11  *
 12  */
 13 
 14 #include <string.h>
 15 #include <unistd.h>
 16 #include "utils.h"
 17 #include "instructions.h"
 18 #include "copy_paste_unaligned_common.h"
 19 
 20 unsigned int expected_instruction = PPC_INST_COPY;
 21 unsigned int instruction_mask = 0xfc0007fe;
 22 
 23 int test_copy_unaligned(void)
 24 {
 25         /* Only run this test on a P9 or later */
 26         SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_00));
 27 
 28         /* Register our signal handler with SIGBUS */
 29         setup_signal_handler();
 30 
 31         /* +1 makes buf unaligned */
 32         copy(cacheline_buf+1);
 33 
 34         /* We should not get here */
 35         return 1;
 36 }
 37 
 38 int main(int argc, char *argv[])
 39 {
 40         return test_harness(test_copy_unaligned, "test_copy_unaligned");
 41 }
 42 

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