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Index > Linux > malloc(c/c++) to asm

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MinhHung



Joined: 10 Sep 2010
Posts: 51
Location: Viet Nam
MinhHung
hi all;
i've make a small program in linux(asm source), i use syscall(int 0x80) in most case to IO program, but i can only used sys_write and sys_read, sys_lseek. a problem when i progress in file IO, i can know file size but don't know how to alloc memory, somebody can tell me how to do that

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sorry for my english
Post 23 Mar 2011, 03:25
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JohnFound



Joined: 16 Jun 2003
Posts: 3502
Location: Bulgaria
JohnFound
You can use libc from your source. You need to import needed functions from the dynamic libraries. (As a variant - you can compile to object file and then to link to the static c libraries).
You can download FreshLib sources from here
The documentation is published here
You can choose to use the FreshLib to access files as well as memory allocations - in result you will have portable application for Win32 and Linux.
On the other hand, you simply can use Linux import macros to import functions you need.

Regards
Post 23 Mar 2011, 05:31
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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
Since you seem to want to use syscalls exclusively, you may want to look at brk() and mmap() with the MAP_ANONYMOUS and MAP_PRIVATE flags.
Post 23 Mar 2011, 05:38
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
Post 23 Mar 2011, 14:43
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MinhHung



Joined: 10 Sep 2010
Posts: 51
Location: Viet Nam
MinhHung
thank for all
Post 25 Mar 2011, 09:42
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