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maslan



Joined: 08 Sep 2003
Posts: 54
maslan
hi guys
i have question here

in linux can i write to the code segment (.text segment) like dos
or only the bss

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Maslan
I'm searching for perfection so, even if u need portability u 've to use Assembly
---
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http://maslanedit.sf.net
http://maslancms.sf.net
Post 15 Apr 2004, 14:36
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maslan



Joined: 08 Sep 2003
Posts: 54
maslan
Smile
ok no answer !!

all i need to use one segment for code ,data ,bss as i do for dos !!!!!
any answer

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Maslan
I'm searching for perfection so, even if u need portability u 've to use Assembly
---
http://www.maslanlab.org
---
http://libosdk.berlios.de
http://maslanedit.sf.net
http://maslancms.sf.net
Post 20 Apr 2004, 15:34
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decard



Joined: 11 Sep 2003
Posts: 1092
Location: Poland
decard
I don't know anything about Linux programming (Wink) But why can't you just try? Try to define your section:
Code:
section readable writeable executable    

and see if it works.

Unfortunatelly I can't check it myself as I don't use (and don't have) Linux.
Post 20 Apr 2004, 15:46
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maslan



Joined: 08 Sep 2003
Posts: 54
maslan
Smile
oh why u don't use linux it is the best OS

_________________
Maslan
I'm searching for perfection so, even if u need portability u 've to use Assembly
---
http://www.maslanlab.org
---
http://libosdk.berlios.de
http://maslanedit.sf.net
http://maslancms.sf.net
Post 20 Apr 2004, 15:49
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maslan



Joined: 08 Sep 2003
Posts: 54
maslan
hey it doesn't work 100% it gives me segmentation fault

_________________
Maslan
I'm searching for perfection so, even if u need portability u 've to use Assembly
---
http://www.maslanlab.org
---
http://libosdk.berlios.de
http://maslanedit.sf.net
http://maslancms.sf.net
Post 24 Apr 2004, 17:48
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 7802
Location: Kraków, Poland
Tomasz Grysztar
Please post some source to clarify your problem.
Post 24 Apr 2004, 18:19
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
To write to the code segment, you need to tell Linux to set the read/write permissions. I use this code at the start of a RetroForth to do this:

Code:
  mov eax, 07dh              ;sys mprotect (pinched from IsForth Smile
      mov ebx, 08048000h
  mov ecx, 00100000h
  mov edx, 7
  int 080h                   ;make the entire program space rwx    


Once this is done, you can write to the code segment freely.
Post 01 May 2004, 12:13
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