binutils-gdb/ld
Christian Eggers 618265039f Introduce new section flag: SEC_ELF_OCTETS
All symbols, sizes and relocations in this section are octets instead of
bytes.  Required for DWARF debug sections as DWARF information is
organized in octets, not bytes.

bfd/
	* section.c (struct bfd_section): New flag SEC_ELF_OCTETS.
	* archures.c (bfd_octets_per_byte): New parameter sec.
	If section is not NULL and SEC_ELF_OCTETS is set, one octet es
	returned [ELF targets only].
	* bfd.c (bfd_get_section_limit): Provide section parameter to
	bfd_octets_per_byte.
	* bfd-in2.h: regenerate.
	* binary.c (binary_set_section_contents): Move call to
	bfd_octets_per_byte into section loop. Provide section parameter
	to bfd_octets_per_byte.
	* coff-arm.c (coff_arm_reloc): Provide section parameter
	to bfd_octets_per_byte.
	* coff-i386.c (coff_i386_reloc): likewise.
	* coff-mips.c (mips_reflo_reloc): likewise.
	* coff-x86_64.c (coff_amd64_reloc): likewise.
	* cofflink.c (_bfd_coff_link_input_bfd): likewise.
	(_bfd_coff_reloc_link_order): likewise.
	* elf.c (_bfd_elf_section_offset): likewise.
	(_bfd_elf_make_section_from_shdr): likewise.
	Set SEC_ELF_OCTETS for sections with names .gnu.build.attributes,
	.debug*, .zdebug* and .note.gnu*.
	* elf32-msp430.c (rl78_sym_diff_handler): Provide section parameter
	to bfd_octets_per_byte.
	* elf32-nds.c (nds32_elf_get_relocated_section_contents): likewise.
	* elf32-ppc.c (ppc_elf_addr16_ha_reloc): likewise.
	* elf32-pru.c (pru_elf32_do_ldi32_relocate): likewise.
	* elf32-s12z.c (opru18_reloc): likewise.
	* elf32-sh.c (sh_elf_reloc): likewise.
	* elf32-spu.c (spu_elf_rel9): likewise.
	* elf32-xtensa.c (bfd_elf_xtensa_reloc): likewise
	* elf64-ppc.c (ppc64_elf_brtaken_reloc): likewise.
	(ppc64_elf_addr16_ha_reloc): likewise.
	(ppc64_elf_toc64_reloc): likewise.
	* elflink.c (bfd_elf_final_link): likewise.
	(bfd_elf_perform_complex_relocation): likewise.
	(elf_fixup_link_order): likewise.
	(elf_link_input_bfd): likewise.
	(elf_link_sort_relocs): likewise.
	(elf_reloc_link_order): likewise.
	(resolve_section): likewise.
	* linker.c (_bfd_generic_reloc_link_order): likewise.
	(bfd_generic_define_common_symbol): likewise.
	(default_data_link_order): likewise.
	(default_indirect_link_order): likewise.
	* srec.c (srec_set_section_contents): likewise.
	(srec_write_section): likewise.
	* syms.c (_bfd_stab_section_find_nearest_line): likewise.
	* reloc.c (_bfd_final_link_relocate): likewise.
	(bfd_generic_get_relocated_section_contents): likewise.
	(bfd_install_relocation): likewise.
	For section which have SEC_ELF_OCTETS set, multiply output_base
	and output_offset with bfd_octets_per_byte.
	(bfd_perform_relocation): likewise.
include/
	* coff/ti.h (GET_SCNHDR_SIZE, PUT_SCNHDR_SIZE, GET_SCN_SCNLEN),
	(PUT_SCN_SCNLEN): Adjust bfd_octets_per_byte calls.
binutils/
	* objdump.c (disassemble_data): Provide section parameter to
	bfd_octets_per_byte.
	(dump_section): likewise
	(dump_section_header): likewise. Show SEC_ELF_OCTETS flag if set.
gas/
	* as.h: Define SEC_OCTETS as SEC_ELF_OCTETS if OBJ_ELF.
	* dwarf2dbg.c: (dwarf2_finish): Set section flag SEC_OCTETS for
	.debug_line, .debug_info, .debug_abbrev, .debug_aranges, .debug_str
	and .debug_ranges sections.
	* write.c (maybe_generate_build_notes): Set section flag
	SEC_OCTETS for .gnu.build.attributes section.
	* frags.c (frag_now_fix): Don't divide by OCTETS_PER_BYTE if
	SEC_OCTETS is set.
	* symbols.c (resolve_symbol_value): Likewise.
ld/
	* ldexp.c (fold_name): Provide section parameter to
	bfd_octets_per_byte.
	* ldlang (init_opb): New argument s. Set opb_shift to 0 if
	SEC_ELF_OCTETS for the current section is set.
	(print_input_section): Pass current section to init_opb.
	(print_data_statement,print_reloc_statement,
	print_padding_statement): Likewise.
	(lang_check_section_addresses): Call init_opb for each
	section.
	(lang_size_sections_1,lang_size_sections_1,
	lang_do_assignments_1): Likewise.
	(lang_process): Pass NULL to init_opb.
2019-11-25 14:32:19 +10:30
..
emulparams Revert "GENERATE_SHLIB_SCRIPT vs. EMBEDDED." 2019-11-08 21:07:43 +10:30
emultempl bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
po Remove CR16C support 2019-11-07 20:09:20 +10:30
scripttempl PR46, cygwin: FAIL: cdtest with -Ur 2019-11-21 19:09:18 +10:30
testsuite PR46, cygwin: FAIL: cdtest with -Ur 2019-11-21 19:09:18 +10:30
.gitignore
aclocal.m4 bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ChangeLog Introduce new section flag: SEC_ELF_OCTETS 2019-11-25 14:32:19 +10:30
ChangeLog-0001
ChangeLog-0203
ChangeLog-2004
ChangeLog-2005
ChangeLog-2006
ChangeLog-2007
ChangeLog-2008
ChangeLog-2009
ChangeLog-2010
ChangeLog-2011
ChangeLog-2012
ChangeLog-2013
ChangeLog-2014
ChangeLog-2015
ChangeLog-2016
ChangeLog-2017
ChangeLog-2018
ChangeLog-9197
ChangeLog-9899
config.in
configure libctf: installable libctf as a shared library 2019-10-03 17:04:56 +01:00
configure.ac libctf: installable libctf as a shared library 2019-10-03 17:04:56 +01:00
configure.host
configure.tgt Remove CR16C support 2019-11-07 20:09:20 +10:30
deffile.h
deffilep.y elf bfd.h tidy 2019-09-23 10:27:22 +09:30
dep-in.sed
elf-hints-local.h
fdl.texi
gen-doc.texi
genscrba.sh Automatic makefile dependencies for generated ld/e*.c 2019-04-13 12:13:22 +09:30
genscripts.sh genscripts comment tidy 2019-10-16 11:03:34 +10:30
h8-doc.texi
ld.h -Bsymbolic is not for PIEs 2019-10-02 23:01:53 +09:30
ld.texi Update the linker documentation regarding the /DISCARD/ linker script section and its interaction with ELF section groups. 2019-11-22 13:24:58 +00:00
ldbuildid.c Fix compile time warning when building the linker in a MinGw32 environment using gcc 8. 2019-05-08 16:54:16 +01:00
ldbuildid.h
ldcref.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldctor.c qsort: ldctor.c CONSTRUCTORS 2019-10-14 16:47:13 +10:30
ldctor.h qsort: ldctor.c CONSTRUCTORS 2019-10-14 16:47:13 +10:30
ldelf.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldelf.h Rename elf32.em to elf.em 2019-09-11 13:45:18 +09:30
ldelfgen.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldelfgen.h bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldemul.c PR13616, linker should pad executable sections with nops, not zeros 2019-10-16 23:07:27 +10:30
ldemul.h bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldexp.c Introduce new section flag: SEC_ELF_OCTETS 2019-11-25 14:32:19 +10:30
ldexp.h
ldfile.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldfile.h Have the linker report an error if the same script is used twice. 2019-05-22 15:58:57 +01:00
ldgram.y bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldint.texi
ldlang.c Introduce new section flag: SEC_ELF_OCTETS 2019-11-25 14:32:19 +10:30
ldlang.h Replace unnecessary null check with a cast. 2019-11-22 13:12:01 +00:00
ldlex-wrapper.c
ldlex.h ld: Add --no-print-map-discarded option 2019-04-11 10:16:31 -07:00
ldlex.l bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldmain.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldmain.h
ldmisc.c Bogus "final link failed" messages 2019-10-07 13:37:23 +10:30
ldmisc.h
ldver.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
ldver.h
ldwrite.c PR13616, linker should pad executable sections with nops, not zeros 2019-10-16 23:07:27 +10:30
ldwrite.h
lexsup.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
MAINTAINERS
Makefile.am Remove CR16C support 2019-11-07 20:09:20 +10:30
Makefile.in Remove CR16C support 2019-11-07 20:09:20 +10:30
mri.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
mri.h
NEWS Remove CR16C support 2019-11-07 20:09:20 +10:30
pe-dll.c qsort: pe-dll.c reloc sorting 2019-10-14 16:47:13 +10:30
pe-dll.h
pep-dll.c
pep-dll.h
plugin.c bfd, ld: add CTF section linking 2019-10-03 17:04:56 +01:00
plugin.h
README
stamp-h.in
sysdep.h
testplug2.c
testplug3.c
testplug4.c
testplug.c
TODO

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		README for LD

This is the GNU linker.  It is distributed with other "binary
utilities" which should be in ../binutils.  See ../binutils/README for
more general notes, including where to send bug reports.

There are many features of the linker:

* The linker uses a Binary File Descriptor library (../bfd)
  that it uses to read and write object files.  This helps
  insulate the linker itself from the format of object files.

* The linker supports a number of different object file
  formats.  It can even handle multiple formats at once:
  Read two input formats and write a third.

* The linker can be configured for cross-linking.

* The linker supports a control language.

* There is a user manual (ld.texi), as well as the
  beginnings of an internals manual (ldint.texi).

Installation
============

See ../binutils/README.

If you want to make a cross-linker, you may want to specify
a different search path of -lfoo libraries than the default.
You can do this by setting the LIB_PATH variable in ./Makefile
or using the --with-lib-path configure switch.

To build just the linker, make the target all-ld from the top level
directory (one directory above this one).

Porting to a new target
=======================

See the ldint.texi manual.

Reporting bugs etc
===========================

See ../binutils/README.

Known problems
==============

The Solaris linker normally exports all dynamic symbols from an
executable.  The GNU linker does not do this by default.  This is
because the GNU linker tries to present the same interface for all
similar targets (in this case, all native ELF targets).  This does not
matter for normal programs, but it can make a difference for programs
which try to dlopen an executable, such as PERL or Tcl.  You can make
the GNU linker export all dynamic symbols with the -E or
--export-dynamic command line option.

HP/UX 9.01 has a shell bug that causes the linker scripts to be
generated incorrectly.  The symptom of this appears to be "fatal error
- scanner input buffer overflow" error messages.  There are various
workarounds to this:
  * Build and install bash, and build with "make SHELL=bash".
  * Update to a version of HP/UX with a working shell (e.g., 9.05).
  * Replace "(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc)" in
    genscripts.sh with "sh ${srcdir}..." (no parens) and make sure the
    emulparams script used exports any shell variables it sets.

Copyright (C) 2012-2019 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.