[llvm-bugs] [Bug 38435] [ARM] `BL $ADDR` becomes `BLX $ADDR` after linking

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38435

Fangrui Song <i at maskray.me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
                 CC|                            |i at maskray.me

--- Comment #3 from Fangrui Song <i at maskray.me> ---
link.x requires a small change to work with lld:

   /DISCARD/ :
   {
-    *(.ARM.exidx.*);
+    *(.ARM.exidx*);
   }
 }

lld can produce more empty sections than GNU ld. The synthetic section
.ARM.exidx needs to be discarded as well even if it has no composing
.ARM.exidx.*


The original problem has been fixed by Peter's https://reviews.llvm.org/D73542
Different from GNU ld, lld will issue a warning:

% ld.lld @response.txt
ld.lld: warning: app0-bb017cc3d2efe9d5e6ed62661cfeec84.rs:(function main:
.text.main+0x2): branch and link relocation: R_ARM_THM_CALL to non STT_FUNC 
symbol: __nop interworking not performed; consider using directive '.type
__nop, %function' to give symbol type STT_FUNC if interworking between ARM a
nd Thumb is required

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