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85 lines
3.7 KiB
C
85 lines
3.7 KiB
C
/* $Id: recode-mmap.h,v 1.2 2008/07/01 23:57:30 fredette Exp $ */
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/* libtme/host/recode-mmap.h - recode header for mmap hosts: */
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/*
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* Copyright (c) 2008 Matt Fredette
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Matt Fredette.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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_TME_RCSID("$Id: recode-mmap.h,v 1.2 2008/07/01 23:57:30 fredette Exp $");
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/* macros: */
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/* the maximum size of a single thunk, in bytes: */
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#define TME_RECODE_HOST_THUNK_SIZE_MAX (32768)
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/* these are the mmap-specific members added to struct tme_recode_ic.
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this macro is added to TME_RECODE_HOST_IC at configure time: */
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#define TME_RECODE_MMAP_IC \
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\
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/* the start of the thunks memory: */ \
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tme_recode_host_insn_t *tme_recode_mmap_ic_thunks_start; \
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/* this converts a thunk build pointer into a thunk offset: */
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#define tme_recode_build_to_thunk_off(ic, build) \
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((build) \
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- (ic)->tme_recode_mmap_ic_thunks_start)
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/* this converts a thunk offset into a thunk function pointer: */
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#define tme_recode_thunk_off_to_pointer(ic, thunk_off, type) \
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((type) \
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((ic)->tme_recode_mmap_ic_thunks_start \
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+ (thunk_off)))
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/* this converts a function pointer (not necessarily a thunk function
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pointer) into a thunk offset. for a thunk function pointer
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returned by tme_recode_thunk_off_to_pointer(), this always
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succeeds. for any other function, this may not succeed, and the
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caller must confirm that tme_recode_thunk_off_to_pointer() recovers
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the function pointer if there is a possibility that it might not
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(due to the limits of a tme_recode_thunk_off_t): */
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#define tme_recode_function_to_thunk_off(ic, func) \
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((tme_recode_thunk_off_t) \
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(((_tme_const tme_recode_host_insn_t *) \
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(func)) \
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- (ic)->tme_recode_mmap_ic_thunks_start))
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/* this reads part of a finished thunk: */
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#define tme_recode_thunk_off_read(ic, thunk_off, type, lvalue) \
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((_tme_const type *) ((ic)->tme_recode_mmap_ic_thunks_start + (thunk_off)) + (0 && (&(lvalue) - 1)))
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/* this writes part of a finished thunk: */
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#define tme_recode_thunk_off_write(ic, thunk_off, type, rvalue) \
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do { \
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*((type *) \
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((ic)->tme_recode_mmap_ic_thunks_start \
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+ (thunk_off))) = rvalue; \
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} while (/* CONSTCOND */ 0)
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