[Bug ld/21459] New: Wrong location for .debug_gdb_scripts on Windows

[egonelbre at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21459

            Bug ID: 21459
           Summary: Wrong location for .debug_gdb_scripts on Windows
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: egonelbre at gmail dot com
  Target Milestone: ---

While debugging go compilation issue
(https://github.com/golang/go/issues/20183)
we trace it to ld placing .debug_gdb_scripts to a wrong location for Windows.

Easiest test-case:

    int main(int argc, char const *argv[]) { return 0; }
    __attribute__ ((section(".debug_gdb_scripts")))
    char data[] = "debug.py";

  > gcc -o example.exe example.c && example.exe
    Access Denied

This also happens when you use any other random .debug_* section... e.g.

    int main(int argc, char const *argv[]) { return 0; }
    __attribute__ ((section(".debug_zzz")))
    char data[] = "debug.py";

Suggestion from Ian Lance Taylor
(https://github.com/golang/go/issues/20183#issuecomment-299167976):

> The GNU linker source files that fail to list the .debug_gdb_scripts 
> section are ld/scripttempl/pe.sc and ld/scripttempl/pep.sc.
> The best fix is to handle this case in gld_${EMULATION_NAME}_place_orphan 
> in ld/emultempl/pe.em and ld/emultempl/pep.em.

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