[Bug gas/9814] New: Gas uses Thumb padding within ARM code

[christophe dot lyon at st dot com]

Bug report linked to http://sourceware.org/ml/binutils/2009-01/msg00380.html

If I assemble the attached ARM/Thumb code using arm-none-eabi-as, and look at
the object file with objdump, I can see:
Disassembly of section .text:

00000000 <app_func2>:
   0:   e12fff1e        bx      lr
   4:   46c046c0        strbmi  r4, [r0], r0, asr #13
   8:   46c046c0        strbmi  r4, [r0], r0, asr #13
   c:   46c046c0        strbmi  r4, [r0], r0, asr #13

Disassembly of section .far_thumb:
00000000 <lab1>:
   0:   e12fff1e        bx      lr
00000004 <lab2>:
   4:   4770            bx      lr
00000006 <lab3>:
   6:   4770            bx      lr

I don't understand why app_func2 is padded with Thumb NOPs while it is written
in ARM mode. If I remove the .thumb_func directive (after lab2), then the
padding is encoded in ARM.

I tried to understand where gas does this padding, but I couldn't find it.

-- 
           Summary: Gas uses Thumb padding within ARM code
           Product: binutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: christophe dot lyon at st dot com
                CC: bug-binutils at gnu dot org
GCC target triplet: arm-none-eabi


http://sourceware.org/bugzilla/show_bug.cgi?id=9814

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