[tbb-bugs] #20322 [Applications/Tor Browser]: SafeSEH support for mingw-w64 for Tor Browser on Windows

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#20322: SafeSEH support for mingw-w64 for Tor Browser on Windows
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 Reporter:  bugzilla                             |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-security, TorBrowserTeam201711,  |  Actual Points:
  GeorgKoppen201711, tbb-rbm                     |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
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Comment (by gk):

 https://docs.microsoft.com/en-us/cpp/build/reference/safeseh-image-has-
 safe-exception-handlers?redirectedfrom=MSDN&view=vs-2019
 {{{
 /SAFESEH is only valid when linking for x86 targets. /SAFESEH is not
 supported for platforms that already have the exception handlers noted.
 For example, on x64 and ARM, all exception handlers are noted in the
 PDATA. ML64.exe has support for adding annotations that emit SEH
 information (XDATA and PDATA) into the image, allowing you to unwind
 through ml64 functions. See MASM for x64 (ml64.exe) for more information.
 }}}
 So, 64bit files `PASS` in our check script just because they are 64bit
 ones. I wonder whether we need to do more here, though, given that we
 don't use `ML64.exe`.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20322#comment:14>
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