diff options
Diffstat (limited to 'lib/substitute.h')
| -rw-r--r-- | lib/substitute.h | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/lib/substitute.h b/lib/substitute.h index 4e4f7f9..224fd04 100644 --- a/lib/substitute.h +++ b/lib/substitute.h @@ -104,6 +104,16 @@ struct substitute_function_hook { void *opt; }; +struct substitute_function_hook_record { + /* Function that was originally hooked. */ + void *function; + /** Should at least be MAX_JUMP_PATCH_SIZE for your platform */ + size_t buffer_size; + /** Store the original code. Must be large enough to hold MAX_JUMP_PATCH_SIZE + * for whatever platform your are targeting! */ + char saved_buffer[]; +}; + /* substitute_hook_functions options */ #ifndef NO_PTHREADS enum { @@ -149,16 +159,26 @@ enum { * @hooks see struct substitute_function_hook * @nhooks number of hooks * @recordp if non-NULL, on success receives a pointer that can be used to - * cleanly undo the hooks; currently unimplemented, so pass NULL + * cleanly undo the hooks * @options options - see above * @return SUBSTITUTE_OK, or any of most of the SUBSTITUTE_ERR_* */ -struct substitute_function_hook_record; int substitute_hook_functions(const struct substitute_function_hook *hooks, size_t nhooks, struct substitute_function_hook_record **recordp, int options); +/** + * @brief Frees hooks and restores original code. + * + * @param records from `substitute_hook_functions` + * @param[in] nhooks Number of hooks to free + * + * @return SUBSTITUTE_OK, or any of most of the SUBSTITUTE_ERR_* + */ +int substitute_free_hooks(struct substitute_function_hook_record *records, + size_t nhooks); + #ifndef NO_DYNAMIC_LINKER_STUFF /* declare dynamic linker-related stuff? */ #ifdef __APPLE__ |