Alan Modra 8c803a2dd7 elf_backend_section_flags and _bfd_elf_init_private_section_data
I was looking at elf_backend_section_flags as a means of setting
SEC_SMALL_DATA for .sdata, .sbss and the like, and condidered adding
an asection* parameter to access the section name easily before
realising that hdr->bfd_section of course makes the section
available.  So no new parameter needed.  In fact the flagword*
parameter isn't needed either, so out it goes.

The patch also tidies some horrible code in _bfd_elf_new_section_hook
that can change whether known ABI sections have sh_type and sh_flags
set up depending on which of the bfd_make_section functions is used.
(Some of those set section flags before _bfd_elf_new_section_hook is
called, others leave the flags zero.)  The function also had some
hacks for .init_array and .fini_array to affect how
_bfd_elf_init_private_section_data behaved for those sections.  It's
cleaner to do that in _bfd_elf_init_private_section_data.  So that all
goes and we now init sh_type and sh_flags for all known ABI sections
in _bfd_elf_new_section_hook.  _bfd_elf_init_private_section_data is
changed to suit, and now doesn't just single out SHT_INIT_ARRAY and
SHT_FINI_ARRAY but rather any of the special section types.

The _bfd_elf_new_section_hook change resulting in
+FAIL: ld-aarch64/erratum835769-843419
exposing some errors in the aarch64 backend.  elfNN_aarch64_size_stubs
should not be looking at linker created sections in the stub bfd.  Nor
should code like "symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr" be
run without first checking that input_bfd is ELF.

	* elf-bfd.h (elf_backend_section_flags): Remove flagword* param.
	* elf.c (_bfd_elf_make_section_from_shdr): Set section flags before
	calling elf_backend_section_flags with adjusted params.  Use
	newsect->flags past that point.
	(_bfd_elf_new_section_hook): Always set sh_type and sh_flags for
	special sections.
	(_bfd_elf_init_private_section_data): Allow normal sh_type sections
	to have their type overridden, and all sh_flags but processor and
	os specific.
	* elf32-arm.c (elf32_arm_section_flags): Adjust for changed params.
	* elf32-mep.c (mep_elf_section_flags): Likewise.
	* elf32-nios2.c (nios2_elf32_section_flags): Likewise.
	* elf64-alpha.c (elf64_alpha_section_flags): Likewise.
	* elf64-ia64-vms.c (elf64_ia64_section_flags): Likewise.
	* elfnn-ia64.c (elfNN_ia64_section_flags): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_size_stubs): Exclude the linker
	stub BFD and non-aarch64 input files when scanning for stubs.
2020-03-02 11:36:19 +10:30
2020-02-28 11:04:28 -05:00
2020-02-22 20:37:18 -05:00
2020-02-20 13:02:24 +10:30
2020-02-26 10:37:25 +10:30
2019-12-26 06:54:58 +01:00
2020-02-17 10:03:15 -07:00
2020-02-17 10:03:15 -07:00
2020-02-17 10:03:15 -07:00
2020-02-07 08:42:25 -07:00
2020-02-07 08:42:25 -07:00

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.
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