[Bug ld/6727] New: Thumb interworking code zero under certain circumstances

[adsouzp at netscape dot net]

PROBLEM DESCRIPTION
under certain circumstances, Thumb interworking code is not
generated correctlyby GNU LD. it is full of NULLs.

with arm-elf-ld:
- if you have --gc-sections enabled
- if you have asm in ARM mode with -mthumb-interwork
- asm code contains an "ax" section .VhaInit with instructions
- if you have a C file in Thumb mode -mthumb with -mthumb-interwork
- if asm code is positioned before C generated code
  using --section-start whereas .text is positioned later with -Ttext
- if you prevent garbage-collection of .VhaInit using instructions
  from .text to access .VhaInit

then, the thumb interworking code is zero.

WORKAROUND
the interworking code is generated correctly if you place -Ttext before
--section-start.

-- 
           Summary: Thumb interworking code zero under certain circumstances
           Product: binutils
           Version: 2.17
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: adsouzp at netscape dot net
                CC: bug-binutils at gnu dot org
  GCC host triplet: CYGWIN_NT-5.1 jenny 1.5.25(0.156/4/2) 2008-06-12 19:34
                    i686 Cygw
GCC target triplet: ARM ELF arm7tdmi armv4t


http://sourceware.org/bugzilla/show_bug.cgi?id=6727

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