How to create a section from compiler/Linker?

[x64Core]

hey guys :D
anyone know how to create a section from the compiler/linker?
I would like to create a section with 200 bytes called "test", normally the compiler/linker creates two or three section ( text,data,imports)
but if want to create a "empty section" ( filled with zero bytes )... it's possible? thanks!

[qWord]

You can use MASM's SEGEMNT/ENDS directives. Place the following snippet somewhere in your program:

Code Select Expand

_test SEGMENT
db 200 dup (?)
_test ENDS
For more details, see MASM's Programmer's Guide and MSDN.

Be warned, MASM sometimes get crazy, when nesting segments.

[hutch--]

It also may be wise if you want to run the EXE on later OS versions to set the new section to the attribute you require, read, write, execute because if you try and execute code that is written to a section that is not marked as executable, the OS will close it down.

You can also try something like this if its code to execute,


.code
  myspace db 200 dup (0)
  start:                                ; the actual start label
  ; more code etc ....


With this you need to know the address of the "myspace" buffer. I gather you want to post patch the executable.

[japheth]

I would like to create a section with 200 bytes called "test", normally the compiler/linker creates two or three section (

"test" is a reserved word inside the assembler. To define a section with this name you'll have to use the ALIAS attribute:

Code Select Expand


.386
.model flat
_TEST segment alias("test")
db 200h dup (?)
_TEST ends


[x64Core]

thanks guys, resolved