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/*
libsubstitute - https://github.com/comex/substitute
This header file is in the public domain (or in any jusrisdiction where the
former is ineffective, CC0 1.0).
*/
#pragma once
#include <stdlib.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/* TODO add numbers */
enum {
SUBSTITUTE_OK = 0,
};
int substitute_hook_function(void *function, void *replacement, int options, void *result);
#if 1 /* declare substitute_find_syms? */
#ifdef __APPLE__
#include <mach-o/nlist.h>
#ifdef __LP64__
typedef struct nlist_64 substitute_sym;
#else
typedef struct nlist substitute_sym;
#endif
#else
#error No definition for substitute_sym!
#endif
struct substitute_image {
#ifdef __APPLE__
intptr_t slide;
void *dlhandle;
const void *image_header;
#endif
/* possibly private fields... */
};
/* Look up an image currently loaded into the process.
*
* @filename the executable/library path (c.f. dyld(3) on Darwin)
* @return a handle, or NULL if the image wasn't found
*/
struct substitute_image *substitute_open_image(const char *filename);
/* Release a handle opened with substitute_open_image.
*
* @handle a banana
*/
void substitute_close_image(struct substitute_image *handle);
/* Look up private symbols in an image currently loaded into the process.
*
* @handle handle opened with substitute_open_image
* @names an array of symbol names to search for
* @nlist an array of substitute_sym *, one per name; on return, each entry
* will be a pointer into the symbol table for that image, or NULL if the
* symbol wasn't found
* @count number of names
*
* @return SUBSTITUTE_OK (maybe errors in the future)
*/
int substitute_find_private_syms(struct substitute_image *handle,
const char **names,
substitute_sym **syms,
size_t count);
/* Get a pointer corresponding to a loaded symbol table entry.
* @handle handle containing the symbol
* @sym symbol
* @return the pointer - on ARM, this can be | 1 for Thumb, like everything
* else
*/
void *substitute_sym_to_ptr(struct substitute_image *handle, substitute_sym *sym);
#endif /* 1 */
#ifdef __cplusplus
} /* extern */
#endif
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