ptrace_wrap.h

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// SPDX-FileCopyrightText: 2018-2021 thestr4ng3r <info@florianmaerkl.de>
// SPDX-License-Identifier: LGPL-3.0-only
 
#ifndef PTRACE_WRAP_H
#define PTRACE_WRAP_H
 
#include <pthread.h>
#include <semaphore.h>
#include <sys/ptrace.h>
 
#ifdef __GLIBC__
typedef enum __ptrace_request ptrace_wrap_ptrace_request;
#else
typedef int ptrace_wrap_ptrace_request;
#endif
 
typedef enum {
    PTRACE_WRAP_REQUEST_TYPE_STOP,
    PTRACE_WRAP_REQUEST_TYPE_PTRACE,
    PTRACE_WRAP_REQUEST_TYPE_FORK,
    PTRACE_WRAP_REQUEST_TYPE_FUNC
} ptrace_wrap_request_type;
 
typedef void *(*ptrace_wrap_func_func)(void *);
 
typedef struct ptrace_wrap_request_t {
    ptrace_wrap_request_type type;
    union {
        struct {
            ptrace_wrap_ptrace_request request;
            pid_t pid;
            void *addr;
            void *data;
            int *_errno;
        } ptrace;
        struct {
            void (*child_callback)(void *);
            void *child_callback_user;
            int *_errno;
        } fork;
        struct {
            ptrace_wrap_func_func func;
            void *user;
        } func;
    };
} ptrace_wrap_request;
 
typedef struct ptrace_wrap_instance_t {
    pthread_t th;
    sem_t request_sem;
    ptrace_wrap_request request;
    sem_t result_sem;
    union {
        long ptrace_result;
        pid_t fork_result;
        void *func_result;
    };
} ptrace_wrap_instance;
 
int ptrace_wrap_instance_start(ptrace_wrap_instance *inst);
void ptrace_wrap_instance_stop(ptrace_wrap_instance *inst);
long ptrace_wrap(ptrace_wrap_instance *inst, ptrace_wrap_ptrace_request request, pid_t pid, void *addr, void *data);
pid_t ptrace_wrap_fork(ptrace_wrap_instance *inst, void (*child_callback)(void *), void *child_callback_user);
void *ptrace_wrap_func(ptrace_wrap_instance *inst, ptrace_wrap_func_func func, void *user);
 
#endif // PTRACE_WRAP_H