Re: [ros-dev] DLL Base Addresses (For Marc)

[Marc Piulachs]

Hi Alex, 

Let me see if I understood this correctly. The problem is not really on
manually choosing the base address, the problem is that module's
"baseaddress" attribute is optional, even when the module is of type
"win32dll", if this attribute is empty rbuild sets a common default base
address (0x10000000 for win32 dll's).

AFAIK we are using the same base address that the equivalent component has
on windows so auto generating it using any sort of tool is not really an
option.

In my rbuild branch I introduced the new element "baseaddress", despite
it's
only a specialized type of "property" it presents some advantages, first of
all it gives *meaning* to the information it contains and also allows more
complex validations as we known what to expect.

This "baseaddres" element has for now and identical syntax to
"property" for
example <baseadress name="BASADRESS_JOY" value="0x589b0000" />
so currently
to use the value it contains module's "basaddress" attribute must
explicitly
reference it by name. I could extend it support an additional attribute
"dllname" so rbuild could try to auto reference it before falling back to
default baseadress in case no value has been specified and no baseaddress
could be resolved by module's target name (module.dll). It would act as a
base addresses index, we could keep adding correct baseaddress even for not
yet existing dlls on reactos. When a module that outputs that dll is created
rbuild will link the image to the right address without developer
intervention.

Sound good to you?

/Marc

-----Original Message-----
From: ros-dev-bounces(a)reactos.org [mailto:[e-mail]] On
Behalf Of Alex Ionescu
Sent: Saturday, December 15, 2007 6:26 PM
To: ReactOS Development List
Subject: [ros-dev] DLL Base Addresses (For Marc)

Hi Marc,

ReactOS desperately needs a tool which builds all the DLLs, then  
looks at the filesize, chooses a lower-bound base address (such as  
0x60000000) and creates a baseadress.xml/.cfg with the right  
addresses for each DLL.

There are then two choices:

- You generate this .xml once on your computer, and commit the new .cfg
- People run this code at every build, the .cfg gets generated, and  
all the DLLs re-linked at the new address (this should take less than  
30 seconds).

The DLL relocation hell in ReactOS has gotten too bad and manually  
choosing base addresses which seem to work doesn't work anymore.

--
Best regards,
Alex Ionescu

_______________________________________________
Ros-dev mailing list
Ros-dev(a)reactos.org
http://www.reactos.org/mailman/listinfo/ros-dev