4375088072
Test that an ISA 3.0 compliant machine performing an unaligned copy, copy_first, paste or paste_last is sent a SIGBUS. Signed-off-by: Chris Smart <chris@distroguy.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/*
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* Copyright 2016, Chris Smart, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Common code for copy, copy_first, paste and paste_last unaligned
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* tests.
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*
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*/
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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#include "utils.h"
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#include "instructions.h"
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#include "copy_paste_unaligned_common.h"
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unsigned int expected_instruction;
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unsigned int instruction_mask;
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char cacheline_buf[128] __cacheline_aligned;
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void signal_action_handler(int signal_num, siginfo_t *info, void *ptr)
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{
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ucontext_t *ctx = ptr;
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#if defined(__powerpc64__)
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unsigned int *pc = (unsigned int *)ctx->uc_mcontext.gp_regs[PT_NIP];
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#else
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unsigned int *pc = (unsigned int *)ctx->uc_mcontext.uc_regs->gregs[PT_NIP];
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#endif
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/*
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* Check that the signal was on the correct instruction, using a
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* mask because the compiler assigns the register at RB.
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*/
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if ((*pc & instruction_mask) == expected_instruction)
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_exit(0); /* We hit the right instruction */
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_exit(1);
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}
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void setup_signal_handler(void)
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{
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struct sigaction signal_action;
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memset(&signal_action, 0, sizeof(signal_action));
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signal_action.sa_sigaction = signal_action_handler;
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signal_action.sa_flags = SA_SIGINFO;
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sigaction(SIGBUS, &signal_action, NULL);
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}
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