34 lines
1.0 KiB
C
34 lines
1.0 KiB
C
/* @(#)faultcode.h 1.1 92/07/30 SMI */
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/*
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* Copyright (c) 1987 by Sun Microsystems, Inc.
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*/
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#ifndef _vm_faultcode_h
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#define _vm_faultcode_h
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/*
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* This file describes the "code" that is delivered during
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* SIGBUS and SIGSEGV exceptions. It also describes the data
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* type returned by vm routines which handle faults.
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*
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* If FC_CODE(fc) == FC_OBJERR, then FC_ERRNO(fc) contains the errno value
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* returned by the underlying object mapped at the fault address.
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*/
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#define FC_HWERR 0x1 /* misc hardware error (e.g. bus timeout) */
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#define FC_ALIGN 0x2 /* hardware alignment error */
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#define FC_NOMAP 0x3 /* no mapping at the fault address */
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#define FC_PROT 0x4 /* access exceeded current protections */
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#define FC_OBJERR 0x5 /* underlying object returned errno value */
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#define FC_MAKE_ERR(e) (((e) << 8) | FC_OBJERR)
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#define FC_CODE(fc) ((fc) & 0xff)
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#define FC_ERRNO(fc) ((unsigned)(fc) >> 8)
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#ifndef LOCORE
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typedef int faultcode_t; /* type returned by vm fault routines */
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#endif LOCORE
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#endif /*!_vm_faultcode_h*/
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