RFA: Fix both_direction

[Daniel Jacobowitz]

On Wed, May 11, 2005 at 01:31:53PM -0400, Daniel Jacobowitz wrote:
> This patch fixes "gdb -write" support for ELF files.  There are two
> problems:
> 
> We try to write out the string table even if we didn't create one. If we've
> bypassed the normal output routines, we never initialize elf_shstrtab, which
> is otherwise OK.  If it's not set, there's nothing we need to do (except not
> crash).
> 
> With that fixed, gdb -write works - as long as you change something, thereby
> encountering the "output_has_begun = TRUE" in bfd_set_section_contents.  If
> you don't, then the linker's output routines are called.  This causes
> sections to get rearranged, destroys special program headers (like
> PT_GNU_STACK), and loses the static symbol table.  I believe that the
> check_format hook is a better place to handle this.
> 
> OK?  Tested on i686-linux, using the binutils testsuite, the gdb testsuite,
> and manual testing of gdb -write (which needs some testsuite coverage of its
> own).

> 2005-05-11  Daniel Jacobowitz  <dan@codesourcery.com>
> 
> 	* elf.c (_bfd_elf_write_object_contents): Check for non-NULL
> 	elf_shstrtab.
> 	* format.c (bfd_check_format_matches): Set output_has_begun
> 	for both_direction.
> 	* section.c (bfd_set_section_contents): Use bfd_write_p.  Remove
> 	special case for both_direction.

Ping?

-- 
Daniel Jacobowitz
CodeSourcery, LLC