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