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/*
* Copyright 2016, Chris Smart, IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Common code for copy, copy_first, paste and paste_last unaligned
* tests.
*
*/
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include "utils.h"
#include "instructions.h"
#include "copy_paste_unaligned_common.h"
unsigned int expected_instruction;
unsigned int instruction_mask;
char cacheline_buf[128] __cacheline_aligned;
void signal_action_handler(int signal_num, siginfo_t *info, void *ptr)
{
ucontext_t *ctx = ptr;
#if defined(__powerpc64__)
unsigned int *pc = (unsigned int *)ctx->uc_mcontext.gp_regs[PT_NIP];
#else
unsigned int *pc = (unsigned int *)ctx->uc_mcontext.uc_regs->gregs[PT_NIP];
#endif
/*
* Check that the signal was on the correct instruction, using a
* mask because the compiler assigns the register at RB.
*/
if ((*pc & instruction_mask) == expected_instruction)
_exit(0); /* We hit the right instruction */
_exit(1);
}
void setup_signal_handler(void)
{
struct sigaction signal_action;
memset(&signal_action, 0, sizeof(signal_action));
signal_action.sa_sigaction = signal_action_handler;
signal_action.sa_flags = SA_SIGINFO;
sigaction(SIGBUS, &signal_action, NULL);
}
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