MBR IT/.NET 247 : get Relative Virtual Address (RVA) of a FieldInfo on microsoft.public.dotnet.framework.clr

get Relative Virtual Address (RVA) of a FieldInfo

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Mehrdad (VIP)

Hello,
My question is related handling assemblies and IL files. I am trying to find
out a way to get the RVA of a field in an assembly and would appreciate any
help. Here is more details:
I load an assembly and get a Module. Then using GetFields(), I get the list
of static fields in that Module. The items of this list are of type
FiledInfo. Now the question is, when the "Attributes" property of one of
these FiledInfo items has a "HasFieldRVA", then how can I read the RVA of
that filed.

thanks,
--mehrdad

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Ben Schwehn

[Original message clipped]

what are you using? the reflection api or the unamanged metadata api or
something else altogther?

when using the unmanaged metadata api you can call

HRESULT IMetaDataImport::GetRVA(mdToken tk, ULONG *pulCodeRVA, DWORD
*pdwImplFlags)

ignore the pdwImplFlags parameter, it's not used for fields.

--
Ben
http://bschwehn.de

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Mehrdad (VIP)

Thanks Ben,
I am using C# and the managed API. I start with Assembly.LoadFrom(...). Is
this the right way? I think what you said is in SDK, can't I use the .NET
library itself for doing that?

If I'd better use the SDK, would you please tell me where to start from? Or
a link to a document or help file?

thank you very much,
--mehrdad.

"Ben Schwehn" wrote:

[Original message clipped]

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Ben Schwehn

[Original message clipped]

Mehrdad,

I don't think you can use the reflection api to do that.

An helpful introduction to the Unmanaged API is in

http://www.iunknown.com/Files/metadata_internals.pdf

other than that look into the "Tool Developers Guide" folder in your
..net framework sdk folder.

Basically you can (after creating the com interfaces and doing an
OpenScope()) use the System.Reflection.FieldInfo.MetadataToken from the
FieldInfo you got from GetFields and pass it to IMetaDataImport::GetRVA

good luck!

--
Ben
http://bschwehn.de

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	System.Reflection.Assembly
	System.Reflection.FieldInfo

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