hooky 0.2.0

Convenient LD_PRELOAD hooker
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

use crate::elf::ObjectInfo;
use std::ops::ControlFlow;
use libc::c_void;

pub unsafe fn initialize_dlsym() -> *mut c_void {
    ObjectInfo::each( |info| {
        if info.name_contains( "libdl.so" ) || info.name_contains( "libc.so" ) {
            if let Some( pointer ) = info.dlsym( "dlsym" ) {
                return ControlFlow::Break( pointer )
            }
        }

        ControlFlow::Continue(())
    }).unwrap_or( std::ptr::null_mut() )
}

pub unsafe fn initialize_dlvsym() -> *mut c_void {
    ObjectInfo::each( |info| {
        if info.name_contains( "libdl.so" ) || info.name_contains( "libc.so" ) {
            if let Some( pointer ) = info.dlsym( "dlvsym" ) {
                return ControlFlow::Break( pointer )
            }
        }

        ControlFlow::Continue(())
    }).unwrap_or( std::ptr::null_mut() )
}

pub unsafe fn initialize_libc_dlsym() -> *mut c_void {
    ObjectInfo::each( |info| {
        if info.name_contains( "libc.so" ) {
            if let Some( pointer ) = info.dlsym( "__libc_dlsym" ) {
                return ControlFlow::Break( pointer )
            }
        }

        ControlFlow::Continue(())
    }).unwrap_or( std::ptr::null_mut() )
}