Commit: Allow numeric values for the flags and type fields in the .section directive

[Nick Clifton]

Hi Guys,

  I have applied the attached patch to enhance GAS's .section
  directive.  It is now possible, for ELF based targets, to specify
  numeric values for the flags and type fields, like this:

	.section sec5, "0xffff0000", @0x80000009

  Prior to this patch we had no generic way to set processor or
  application specific values in these fields, which was kind of silly
  given that the ELF spec allows them and quite a few targets use them.

  Whilst developing the patch I found that readelf's -S output was not
  listing the "C" compressed section flag, so I added that in.  But this
  upset a lot of tests that were dependent upon the formatting of
  readelf's description of its flags.  Since this is not actually a
  critical feature of these tests, I also took the liberty of removing
  the dependency.

  I also encountered a small bug with the V850 target which could
  generate a null string to describe a processor specific type that it
  did not recognise.  This has also been fixed.

Cheers
  Nick

gas/ChangeLog
2016-02-15  Nick Clifton  <nickc@redhat.com>

	* doc/as.texinfo (.section): Document that numeric values can now
	be used for the flags and type fields of the ELF target's .section
	directive.  Add notes about the restrictions on setting flags and
	types.
	* config/obj-elf.c (obj_elf_change_section): Allow known sections
	to be given processor specific section types.  Allow processor and
	application specific flags of a section to be set after
	definition.
	(obj_elf_parse_section_letters): Handle parsing numeric values.
	(obj_elf_section_type): Handle parsing numeric values.
	(obj_elf_section): Allow numeric type values.
	* config/obj-elf.h (obj_elf_change_section): Update prototype.
	* testsuite/gas/elf/section10.d: New test.
	* testsuite/gas/elf/section10.s: Source file for new test.
	* testsuite/gas/elf/elf.exp: Run the new test.
	* testsuite/gas/i386/ilp32/x86-64-unwind.d: Remove dependency upon
	the description of the flags produced by readelf.
	* testsuite/gas/tic6x/scomm-directive-4.d: Likewise.
	* NEWS: Mention the new feature.

bfd/ChangeLog
2016-02-15  Nick Clifton  <nickc@redhat.com>

	* elf-bfd.h (struct bfd_elf_special_section): Use unsigned values
	for length and type fields.  Use a signed value for the
	suffix_length field.

binutils/ChangeLog
2016-02-15  Nick Clifton  <nickc@redhat.com>

	* readelf.c (get_section_type_name): Add hex prefix to offsets
	printed for LOPROC and LOOS values.  Ensure that a result is
	always returned for the V850 target, even when an unrecognised
	processor specific value is encountered.
	(process_section_headers): Display key values in the order in
	which they appear to the user.  Add the "C (compressed)" value to
	the list.

ld/ChangeLog
2016-02-15  Nick Clifton  <nickc@redhat.com>

	* testsuite/ld-i386/pr12718.d: Remove dependency upon the
	description of the flags produced by readelf.
	* testsuite/ld-i386/pr12921.d: Likewise.
	* testsuite/ld-i386/tlsbin-nacl.rd: Likewise.
	* testsuite/ld-i386/tlsbin.rd: Likewise.
	* testsuite/ld-i386/tlsbindesc-nacl.rd: Likewise.
	* testsuite/ld-i386/tlsbindesc.rd: Likewise.
	* testsuite/ld-i386/tlsdesc-nacl.rd: Likewise.
	* testsuite/ld-i386/tlsdesc.rd: Likewise.
	* testsuite/ld-i386/tlsgdesc-nacl.rd: Likewise.
	* testsuite/ld-i386/tlsgdesc.rd: Likewise.
	* testsuite/ld-i386/tlsnopic-nacl.rd: Likewise.
	* testsuite/ld-i386/tlsnopic.rd: Likewise.
	* testsuite/ld-i386/tlspic-nacl.rd: Likewise.
	* testsuite/ld-i386/tlspic.rd: Likewise.
	* testsuite/ld-s390/tlsbin.rd: Likewise.
	* testsuite/ld-s390/tlsbin_64.rd: Likewise.
	* testsuite/ld-s390/tlspic.rd: Likewise.
	* testsuite/ld-s390/tlspic_64.rd: Likewise.
	* testsuite/ld-sh/tlsbin-2.d: Likewise.
	* testsuite/ld-sh/tlspic-2.d: Likewise.
	* testsuite/ld-tic6x/common.d: Likewise.
	* testsuite/ld-tic6x/shlib-1.rd: Likewise.
	* testsuite/ld-tic6x/shlib-1b.rd: Likewise.
	* testsuite/ld-tic6x/shlib-1r.rd: Likewise.
	* testsuite/ld-tic6x/shlib-1rb.rd: Likewise.
	* testsuite/ld-tic6x/shlib-app-1.rd: Likewise.
	* testsuite/ld-tic6x/shlib-app-1b.rd: Likewise.
	* testsuite/ld-tic6x/shlib-app-1r.rd: Likewise.
	* testsuite/ld-tic6x/shlib-app-1rb.rd: Likewise.
	* testsuite/ld-tic6x/shlib-noindex.rd: Likewise.
	* testsuite/ld-tic6x/static-app-1.rd: Likewise.
	* testsuite/ld-tic6x/static-app-1b.rd: Likewise.
	* testsuite/ld-tic6x/static-app-1r.rd: Likewise.
	* testsuite/ld-tic6x/static-app-1rb.rd: Likewise.
	* testsuite/ld-x86-64/ilp32-4-nacl.d: Likewise.
	* testsuite/ld-x86-64/ilp32-4.d: Likewise.
	* testsuite/ld-x86-64/pr12718.d: Likewise.
	* testsuite/ld-x86-64/pr12921.d: Likewise.
	* testsuite/ld-x86-64/split-by-file-nacl.rd: Likewise.
	* testsuite/ld-x86-64/split-by-file.rd: Likewise.
	* testsuite/ld-x86-64/tlsbin-nacl.rd: Likewise.
	* testsuite/ld-x86-64/tlsbin.rd: Likewise.
	* testsuite/ld-x86-64/tlsbindesc-nacl.rd: Likewise.
	* testsuite/ld-x86-64/tlsbindesc.rd: Likewise.
	* testsuite/ld-x86-64/tlsdesc-nacl.rd: Likewise.
	* testsuite/ld-x86-64/tlsdesc.rd: Likewise.
	* testsuite/ld-x86-64/tlsgdesc-nacl.rd: Likewise.
	* testsuite/ld-x86-64/tlsgdesc.rd: Likewise.
	* testsuite/ld-x86-64/tlspic-nacl.rd: Likewise.
	* testsuite/ld-x86-64/tlspic.rd: Likewise.
	* testsuite/ld-xtensa/tlsbin.rd: Likewise.
	* testsuite/ld-xtensa/tlspic.rd: Likewise.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: gas.numeric-section.patch
Type: text/x-patch
Size: 43247 bytes
Desc: not available
URL: <https://sourceware.org/pipermail/binutils/attachments/20160215/88e8310c/attachment.bin>