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78 lines
3.1 KiB
C
78 lines
3.1 KiB
C
// Copyright (c) 2013, Facebook, Inc.
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// All rights reserved.
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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 are met:
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name Facebook nor the names of its contributors may be used to
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// endorse or promote products derived from this software without specific
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// prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef fishhook_h
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#define fishhook_h
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#include <stddef.h>
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#include <stdint.h>
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#if !defined(FISHHOOK_EXPORT)
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#define FISHHOOK_VISIBILITY __attribute__((visibility("hidden")))
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#else
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#define FISHHOOK_VISIBILITY __attribute__((visibility("default")))
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif //__cplusplus
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/**
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* A structure representing a particular intended rebinding from a symbol
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* name to its replacement
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*/
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struct rebinding {
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const char *name;
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void *replacement;
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void **replaced;
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};
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/**
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* For each rebinding in rebindings, rebinds references to external, indirect
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* symbols with the specified name to instead point at replacement for each
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* image in the calling process as well as for all future images that are loaded
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* by the process. If rebind_functions is called more than once, the symbols to
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* rebind are added to the existing list of rebindings, and if a given symbol
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* is rebound more than once, the later rebinding will take precedence.
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* @return 0 on success
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*/
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FISHHOOK_VISIBILITY
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int flex_rebind_symbols(struct rebinding rebindings[], size_t rebindings_nel);
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/**
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* Rebinds as above, but only in the specified image. The header should point
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* to the mach-o header, the slide should be the slide offset. Others as above.
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* @return 0 on success
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*/
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FISHHOOK_VISIBILITY
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int flex_rebind_symbols_image(void *header,
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intptr_t slide,
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struct rebinding rebindings[],
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size_t rebindings_nel);
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#ifdef __cplusplus
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}
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#endif //__cplusplus
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#endif //fishhook_h
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