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Index > Linux > load *.so from memory

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charme



Joined: 08 Jan 2010
Posts: 22
charme
we know that, dlopen dlsym dlclose
but these API just for the file.

if i want load it from memory,how can i do?

i just read the dlopen src(in glibc),but i dont't know futher.
so anyone study this?


ths

just like this!

Code:
unsigned char socontent[] = {0x30,0x10 ...};
void* map = _mydlopen(socontent);
dlsym(map,"xxx");
...
    

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Post 06 Dec 2013, 03:00
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HaHaAnonymous



Joined: 02 Dec 2012
Posts: 1180
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HaHaAnonymous
[ Post removed by author. ]


Last edited by HaHaAnonymous on 28 Feb 2015, 19:08; edited 1 time in total
Post 08 Dec 2013, 17:49
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charme



Joined: 08 Jan 2010
Posts: 22
charme
HaHaAnonymous wrote:
Quote:

if i want load it from memory,how can i do?

Are you coding a malicious software?

If not, I can't see a valid reason why you want to do that so much. An external ".so" won't kill anyone (not to mention it is very common).

Possibilities:
1.If you still want to load it from memory, then recreating the functions you need in your own application will work.

> Don't be lazy! Let's work!

2.Keep the ".so" in your "executable" and then extracting and loading it during runtime.

> The easier way, but not very attractive.

3.Literally loading it from memory without accessing the disk or other device.

Sorry, I never tried option 3. Try asking some Linux experts or read some books to understand how it works and create by yourself the method to achieve the desired result (the best way).

Thank you for posting!


thank you anyway.
first,i dosn't coding a malicious software,just want protect my so file(because some core function in it)

idea1:i just researching about this.
idea2:this can be ok,but not effective.i had test it.

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Post 09 Dec 2013, 04:32
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