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plthook.h
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plthook.h
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/* -*- indent-tabs-mode: nil -*-
*
* plthook.h -- the header file of plthook
*
* URL: https://github.com/kubo/plthook
*
* ------------------------------------------------------
*
* Copyright 2013-2024 Kubo Takehiro <[email protected]>
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''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 <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.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of the authors.
*
*/
#ifndef PLTHOOK_H
#define PLTHOOK_H 1
#define PLTHOOK_SUCCESS 0
#define PLTHOOK_FILE_NOT_FOUND 1
#define PLTHOOK_INVALID_FILE_FORMAT 2
#define PLTHOOK_FUNCTION_NOT_FOUND 3
#define PLTHOOK_INVALID_ARGUMENT 4
#define PLTHOOK_OUT_OF_MEMORY 5
#define PLTHOOK_INTERNAL_ERROR 6
#define PLTHOOK_NOT_IMPLEMENTED 7
typedef struct plthook plthook_t;
#ifdef __cplusplus
extern "C" {
#endif
int plthook_open(plthook_t **plthook_out, const char *filename);
int plthook_open_by_handle(plthook_t **plthook_out, void *handle);
int plthook_open_by_address(plthook_t **plthook_out, void *address);
int plthook_enum(plthook_t *plthook, unsigned int *pos, const char **name_out, void ***addr_out);
int plthook_replace(plthook_t *plthook, const char *funcname, void *funcaddr, void **oldfunc);
void plthook_close(plthook_t *plthook);
const char *plthook_error(void);
/* enumerate entries with memory protection information (bitwise-OR of PROT_READ, PROT_WRITE and PROT_EXEC)
*
* source: plthook_elf.c and plthook_osx.c
*/
int plthook_enum_with_prot(plthook_t *plthook, unsigned int *pos, const char **name_out, void ***addr_out, int *prot);
typedef struct {
const char *name;
void **addr;
#ifdef __APPLE__
int addend;
// memory protection information. bitwise-OR of PROT_READ, PROT_WRITE and PROT_EXEC
int prot;
char weak;
#endif
} plthook_entry_t;
int plthook_enum_entry(plthook_t *plthook, unsigned int *pos, plthook_entry_t *entry);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif