Re: Parse out the function address wrong in `nm` version 3.40

[Alan Modra]

On Thu, Jul 27, 2023 at 02:23:11PM +0800, Fr3v1 wrote:
> Hi, I am using the command `nm --defined-only  -l  --demangle=auto -n
> libexpatw.so.1_withsym  > libexpatw_nm` to get the function address and
> corresponding address in source code.
> And the result seems not correct enough: every function address is one byte
> more than the result in IDA (which the result in IDA is the same as the the
> info in dwarfdump and llvm-dwarfdump) e.g: in IDA the
> function processXmlDecl starts at text:0000397C, but the nm shows it starts
> at 0000397D.
> I tested some other files, but only this one trigger this thing.

See the ARM EABI documents.  Thumb function symbols are marked by
setting the low bit of their value.

-- 
Alan Modra
Australia Development Lab, IBM