Hello VC,
Given a non-DotNET dll from some unknown place
How do I know the classes in it, or how do I view the classes, methods,
properties etc..
Thank you
16  8653 
"News VS.NET ( MS ILM )" <sq**********@h otmail.com> wrote in message
news:uC******** ******@TK2MSFTN GP09.phx.gbl... Given a non-DotNET dll from some unknown place
How do I know the classes in it, or how do I view the classes, methods,
properties etc..
Short answer: you don't.
Longer answer:
You can inspect what a DLL exports (using the MS tools) with this command
dumpbin/exports randomDLL.dll
That gets you the public name of the functions that are exported by name.
Functions may be exported without names. Not all member functions in classes
need to be exported.
In many (all?) cases, it turns out that C++ member functions have names
which are decorated (mangled) by the compiler to include information about
the number and type of arguments and return value. However, C++ compilers
don't use the same decoration scheme. So, if you know the compiler used to
generate the object code you may glean some information but not a lot.
Regards.
Will
Thank Will
I will try it
"William DePalo [MVP VC++ ]" <wi***********@ mvps.org> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. .. "News VS.NET ( MS ILM )" <sq**********@h otmail.com> wrote in message
news:uC******** ******@TK2MSFTN GP09.phx.gbl... Given a non-DotNET dll from some unknown place
How do I know the classes in it, or how do I view the classes, methods,
properties etc..
Short answer: you don't.
Longer answer:
You can inspect what a DLL exports (using the MS tools) with this command
dumpbin/exports randomDLL.dll
That gets you the public name of the functions that are exported by name.
Functions may be exported without names. Not all member functions in
classes need to be exported.
In many (all?) cases, it turns out that C++ member functions have names
which are decorated (mangled) by the compiler to include information about
the number and type of arguments and return value. However, C++ compilers
don't use the same decoration scheme. So, if you know the compiler used to
generate the object code you may glean some information but not a lot.
Regards.
Will
I have tried to use the dumpbin and all I get the following
C:\Temp>dumpbin/exports "C:\Program Files\SOYO\HW Monitor\itevio. dll"
(null) : error : cannot execute LINK.EXE
"William DePalo [MVP VC++ ]" <wi***********@ mvps.org> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. .. "News VS.NET ( MS ILM )" <sq**********@h otmail.com> wrote in message
news:uC******** ******@TK2MSFTN GP09.phx.gbl... Given a non-DotNET dll from some unknown place
How do I know the classes in it, or how do I view the classes, methods,
properties etc..
Short answer: you don't.
Longer answer:
You can inspect what a DLL exports (using the MS tools) with this command
dumpbin/exports randomDLL.dll
That gets you the public name of the functions that are exported by name.
Functions may be exported without names. Not all member functions in
classes need to be exported.
In many (all?) cases, it turns out that C++ member functions have names
which are decorated (mangled) by the compiler to include information about
the number and type of arguments and return value. However, C++ compilers
don't use the same decoration scheme. So, if you know the compiler used to
generate the object code you may glean some information but not a lot.
Regards.
Will
News VS.NET ( MS ILM ) wrote: I have tried to use the dumpbin and all I get the following
C:\Temp>dumpbin/exports "C:\Program Files\SOYO\HW Monitor\itevio. dll"
(null) : error : cannot execute LINK.EXE
You're not running on a properly configured command prompt. It's easiest if
you use the "Visual Studio Command Prompt" shortcut that's installed in the
start menu when you install visual studio. If you did do that and got he
above error, then your Visual Studio installation is messed up somehow.
-cd
Carl Daniel, Thank you very much
After dumpbin/exports "C:\Program Files\SOYO\HW Monitor\itevio. dll"
I get the following: How do I read this, I need to know the function names
that my code can call
I am trying to get the CPU temperature using this Soyo .dll? any ideas?
thank you
Dump of file C:\Program Files\SOYO\HW Monitor\itevio. dll
File Type: DLL
Section contains the following exports for itevio.dll
00000000 characteristics
0 time date stamp Wed Dec 31 16:00:00 1969
0.00 version
1 ordinal base
5 number of functions
5 number of names
ordinal hint RVA name
4 0 0000158D Inb
3 1 0000157C Outb
2 2 000012BF ReadReg
1 3 000012A8 WriteReg
5 4 0000A17C ___CPPdebugHook
Summary
7000 .data
1000 .edata
1000 .idata
1000 .reloc
1000 .rsrc
9000 .text
1000 .tls
"Carl Daniel [VC++ MVP]" <cp******@nospa m.mvps.org> wrote in message
news:Oj******** ******@TK2MSFTN GP12.phx.gbl... News VS.NET ( MS ILM ) wrote: I have tried to use the dumpbin and all I get the following
C:\Temp>dumpbin/exports "C:\Program Files\SOYO\HW Monitor\itevio. dll"
(null) : error : cannot execute LINK.EXE
You're not running on a properly configured command prompt. It's easiest
if you use the "Visual Studio Command Prompt" shortcut that's installed in
the start menu when you install visual studio. If you did do that and got he
above error, then your Visual Studio installation is messed up somehow.
-cd
"News VS.NET ( MS ILM )" <sq**********@h otmail.com> wrote in message
news:On******** ******@TK2MSFTN GP12.phx.gbl... I get the following: How do I read this, I need to know the function
names that my code can call
I am trying to get the CPU temperature using this Soyo .dll? any ideas?
...
ordinal hint RVA name
4 0 0000158D Inb
3 1 0000157C Outb
2 2 000012BF ReadReg
1 3 000012A8 WriteReg
5 4 0000A17C ___CPPdebugHook
The section above reports that Inb, Outb, ReadReg, WriteReg and
__CPPdebugHook are functions which "clients" of this DLL may call. (The last
export is a clue, I think, that Borland tools were used to link the DLL.).
That does you little good, however as it doesn't speak to calling
conventions or the requirements imposed by those functions.
Now, it may be a violation of licensing, but one thing that you can do to
further your investigation is to build set break points at those functions
to get a feel for what is being passed into, and returned from, those
functions. The column labeled RVA gives the "relative virtual address" of
the functions which is the offset from the base of the DLL.
Another hack is to build a DLL in assembly language with the same name and
with the same set of "naked exports" (one's with neither prolog nor epilog).
Those exports would do little more than load the real DLL and jump to the
corresponding export in the original DLL. Note that I said jump and not
call. That's because you don't want to muck with the stack until you
understand how parameters are passed on the stack before the call and how
they are popped off after the call. The advantage here to doing this is that
it is easier to set breakpoints in code you wrote with your development
environment than to set them in someone else's binary where all you have is
an address.
<aside>
I did this once and I can tell you that it is not fun. :-(
</aside>
Regards,
Will
"News VS.NET ( MS ILM )" wrote:
Given a non-DotNET dll from some unknown place
How do I know the classes in it, or how do I view the classes, methods,
properties etc..
Depends will give the friendliest output for straight C++, since it
will decode C++ name mangling.
The OLE/COM object viewer will do a fine job with a COM type library,
which many COM dlls will have attached.
--
Craig Powers
MVP - Visual C++
Will,
You are a person endowed with transcendent mental superiority.
You blew my mind away.
I am trying to get the cpu temperature. I was hoping that the soyo .dll will
give me the function I need as is
Thank you for your experties you defenetly tought me something
I don't know how long it will take me to figure it out or find a simpler
solution
Thanks again Will.
"William DePalo [MVP VC++ ]" <wi***********@ mvps.org> wrote in message
news:eO******** ********@TK2MSF TNGP12.phx.gbl. .. "News VS.NET ( MS ILM )" <sq**********@h otmail.com> wrote in message
news:On******** ******@TK2MSFTN GP12.phx.gbl... I get the following: How do I read this, I need to know the function names that my code can call
I am trying to get the CPU temperature using this Soyo .dll? any ideas?
...
ordinal hint RVA name
4 0 0000158D Inb
3 1 0000157C Outb
2 2 000012BF ReadReg
1 3 000012A8 WriteReg
5 4 0000A17C ___CPPdebugHook
The section above reports that Inb, Outb, ReadReg, WriteReg and
__CPPdebugHook are functions which "clients" of this DLL may call. (The
last export is a clue, I think, that Borland tools were used to link the DLL.).
That does you little good, however as it doesn't speak to calling
conventions or the requirements imposed by those functions.
Now, it may be a violation of licensing, but one thing that you can do to
further your investigation is to build set break points at those functions
to get a feel for what is being passed into, and returned from, those
functions. The column labeled RVA gives the "relative virtual address" of
the functions which is the offset from the base of the DLL.
Another hack is to build a DLL in assembly language with the same name and
with the same set of "naked exports" (one's with neither prolog nor
epilog). Those exports would do little more than load the real DLL and jump to the
corresponding export in the original DLL. Note that I said jump and not
call. That's because you don't want to muck with the stack until you
understand how parameters are passed on the stack before the call and how
they are popped off after the call. The advantage here to doing this is
that it is easier to set breakpoints in code you wrote with your development
environment than to set them in someone else's binary where all you have
is an address.
<aside>
I did this once and I can tell you that it is not fun. :-(
</aside>
Regards,
Will
Craig,
Depends? Sorry I am not familiar with.
Can you please give more info
Thank you for your help
"Craig Powers" <en****@hal-pc.org> wrote in message
news:3F******** ******@hal-pc.org... "News VS.NET ( MS ILM )" wrote:
Given a non-DotNET dll from some unknown place
How do I know the classes in it, or how do I view the classes, methods,
properties etc..
Depends will give the friendliest output for straight C++, since it
will decode C++ name mangling.
The OLE/COM object viewer will do a fine job with a COM type library,
which many COM dlls will have attached.
--
Craig Powers
MVP - Visual C++ This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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