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72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/*
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* Stack-less Just-In-Time compiler
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*
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* Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, 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 POSSIBILITY OF SUCH DAMAGE.
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*/
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#define SLJIT_HAS_CHUNK_HEADER
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#define SLJIT_HAS_EXECUTABLE_OFFSET
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struct sljit_chunk_header {
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void *executable;
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};
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/*
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* MAP_REMAPDUP is a NetBSD extension available sinde 8.0, make sure to
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* adjust your feature macros (ex: -D_NETBSD_SOURCE) as needed
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*/
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static SLJIT_INLINE struct sljit_chunk_header* alloc_chunk(sljit_uw size)
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{
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struct sljit_chunk_header *retval;
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retval = (struct sljit_chunk_header *)mmap(NULL, size,
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PROT_READ | PROT_WRITE | PROT_MPROTECT(PROT_EXEC),
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MAP_ANON | MAP_SHARED, -1, 0);
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if (retval == MAP_FAILED)
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return NULL;
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retval->executable = mremap(retval, size, NULL, size, MAP_REMAPDUP);
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if (retval->executable == MAP_FAILED) {
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munmap((void *)retval, size);
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return NULL;
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}
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if (mprotect(retval->executable, size, PROT_READ | PROT_EXEC) == -1) {
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munmap(retval->executable, size);
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munmap((void *)retval, size);
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return NULL;
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}
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return retval;
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}
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static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
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{
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struct sljit_chunk_header *header = ((struct sljit_chunk_header *)chunk) - 1;
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munmap(header->executable, size);
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munmap((void *)header, size);
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}
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#include "sljitExecAllocatorCore.c"
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