binutils-gdb/ld
Alan Modra 63b4cc53dc TRUE/FALSE simplification
There is really no need to write code like "foo != 0 ? TRUE : FALSE"
unless we had stupidly defined FALSE as something other than 0 or TRUE
as something other than 1.  The simpler "foo != 0" does just as well.
Similarly "(condition == TRUE)" or "(condition == FALSE) can be
simplified to "(condition)" and "(!condition)" respectively.

I'll note that there is reason to use "integer_expression != 0" when
assigning a bfd_boolean rather than the simpler "integer_expression",
if you expect the variable to have 0 or 1 value.  It's probably even a
good idea to not rely on implicit conversion if bfd_boolean were _Bool.

bfd/
	* aoutx.h (aout_link_write_symbols): Don't cast boolean expression
	to bfd_boolean.
	* elf32-or1k.c (or1k_set_got_and_rela_sizes): Dont compare booleans
	against FALSE.
	* elf32-arc.c (name_for_global_symbol): Don't compare boolean to TRUE.
	(is_reloc_PC_relative): Don't use "boolean_condition ? TRUE : FALSE".
	(is_reloc_SDA_relative, is_reloc_for_GOT): Likewise.
	(is_reloc_for_PLT, is_reloc_for_TLS): Likewise.
	* elf32-arm.c (stm32l4xx_need_create_replacing_stub): Likewise.
	* elf32-nds32.c (insert_nds32_elf_blank): Likewise.
	* elf32-rx.c (rx_set_section_contents): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Likewise.
	* elfxx-mips.c (_bfd_mips_elf_ignore_undef_symbol): Likewise.
	* mach-o.c (bfd_mach_o_read_command): Likewise.
	* targets.c (bfd_get_target_info): Likewise.
binutils/
	* dlltool.c (main): Don't use "boolean_condition ? TRUE : FALSE".
	* dwarf.c (read_and_display_attr_value): Likewise.
	(display_debug_str_offsets): Likewise.
	* objdump.c (dump_bfd): Likewise.
	* readelf.c (dump_section_as_strings): Likewise.
	(dump_section_as_bytes): Likewise.
gas/
	* atof-generic.c (FALSE, TRUE): Don't define.
	* config/obj-elf.h (FALSE, TRUE): Don't define.
	* config/obj-som.h (FALSE, TRUE): Don't define.
	* config/tc-hppa.h (FALSE, TRUE): Don't define.
	* config/tc-pdp11.c (FALSE, TRUE): Don't define.
	* config/tc-iq2000.h (obj_fix_adjustable): Delete.
	* config/tc-m32r.h (TC_FIX_ADJUSTABLE): Delete.
	* config/tc-mt.h (obj_fix_adjustable): Delete.
	* config/tc-nds32.h (TC_FIX_ADJUSTABLE): Delete.
	* config/tc-arc.c (parse_opcode_flags): Simplify boolean expression.
	(relaxable_flag, relaxable_operand, assemble_insn): Likewise.
	(tokenize_extregister): Likewise.
	* config/tc-csky.c (parse_opcode, get_operand_value): Likewise.
	(parse_operands_op, parse_operands, md_assemble): Likewise.
	* config/tc-d10v.c (build_insn): Likewise.
	* config/tc-score.c (s3_gen_insn_frag): Likewise.
	* config/tc-score7.c (s7_gen_insn_frag, s7_relax_frag): Likewise.
	* config/tc-tic6x.c (tic6x_update_features, md_assemble): Likewise.
	* config/tc-z80.c (emit_byte): Likewise.
include/
	* opcode/aarch64.h (alias_opcode_p): Simplify boolean expression.
	(opcode_has_alias, pseudo_opcode_p, optional_operand_p): Likewise.
	(opcode_has_special_coder): Likewise.
ld/
	* emultempl/aix.em (gld${EMULATION_NAME}_before_allocation): Simplify
	boolean expression.
	* lexsup.c (parse_args): Likewise.
	* pe-dll.c (pe_dll_id_target): Likewise.
opcodes/
	* aarch64-opc.c (vector_qualifier_p): Simplify boolean expression.
	(fp_qualifier_p, get_data_pattern): Likewise.
	(aarch64_get_operand_modifier_from_value): Likewise.
	(aarch64_extend_operator_p, aarch64_shift_operator_p): Likewise.
	(operand_variant_qualifier_p): Likewise.
	(qualifier_value_in_range_constraint_p): Likewise.
	(aarch64_get_qualifier_esize): Likewise.
	(aarch64_get_qualifier_nelem): Likewise.
	(aarch64_get_qualifier_standard_value): Likewise.
	(get_lower_bound, get_upper_bound): Likewise.
	(aarch64_find_best_match, match_operands_qualifier): Likewise.
	(aarch64_print_operand): Likewise.
	* aarch64-opc.h (operand_has_inserter, operand_has_extractor): Likewise.
	(operand_need_sign_extension, operand_need_shift_by_two): Likewise.
	(operand_need_shift_by_four, operand_maybe_stack_pointer): Likewise.
	* arm-dis.c (print_insn_mve, print_insn_thumb32): Likewise.
	* tic6x-dis.c (tic6x_check_fetch_packet_header): Likewise.
	(print_insn_tic6x): Likewise.
2021-03-29 11:22:22 +10:30
..
emulparams Remove arm-symbianelf 2021-02-09 23:36:16 +10:30
emultempl TRUE/FALSE simplification 2021-03-29 11:22:22 +10:30
po Remove arm-symbianelf 2021-02-09 23:36:16 +10:30
scripttempl aix: implement TLS relocation for gas and ld 2021-03-12 22:47:33 +10:30
testsuite ld: do not rely on the exact size of the CTF symtypetabs in test results 2021-03-25 16:32:53 +00:00
.gitignore
aclocal.m4 Implement a workaround for GNU mak jobserver 2021-01-12 05:45:44 -08:00
ChangeLog TRUE/FALSE simplification 2021-03-29 11:22:22 +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 rotation 2018-01-03 17:49:42 +10:30
ChangeLog-2018 ChangeLog rotation 2019-01-01 21:25:40 +10:30
ChangeLog-2019 ChangeLog rotation 2020-01-01 18:12:08 +10:30
ChangeLog-2020 ChangeLog rotation 2021-01-01 10:31:02 +10:30
ChangeLog-9197
ChangeLog-9899 PR27116, Spelling errors found by Debian style checker 2021-01-01 14:36:35 +10:30
config.in Add a new option to the linker: --error-handling-script=<NAME>. Run the script <NAME> if an undefined symbol or unfound library error is encountered. 2020-10-16 11:37:26 +01:00
configure Implement a workaround for GNU mak jobserver 2021-01-12 05:45:44 -08:00
configure.ac Implement a workaround for GNU mak jobserver 2021-01-12 05:45:44 -08:00
configure.host Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
configure.tgt Remove arm-symbianelf 2021-02-09 23:36:16 +10:30
deffile.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
deffilep.y Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
dep-in.sed
elf-hints-local.h
fdl.texi
gen-doc.texi Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
genscrba.sh Automatic makefile dependencies for generated ld/e*.c 2019-04-13 12:13:22 +09:30
genscripts.sh Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
h8-doc.texi Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ld.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ld.texi PR27451, -z start_stop_gc 2021-03-01 17:28:03 +10:30
ldbuildid.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldbuildid.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldcref.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldctor.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldctor.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldelf.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldelf.h elf/x86-64: Subtract __ImageBase for R_AMD64_IMAGEBASE 2021-03-05 18:25:06 -08:00
ldelfgen.c bfd, ld, libctf: skip zero-refcount strings in CTF string reporting 2021-03-02 15:10:10 +00:00
ldelfgen.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldemul.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldemul.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldexp.c ld: don't generate base relocations in PE output for absolute symbols 2021-03-04 16:55:01 +01:00
ldexp.h ld: don't generate base relocations in PE output for absolute symbols 2021-03-04 16:55:01 +01:00
ldfile.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldfile.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldgram.y ld --defsym 2021-02-02 01:27:12 +10:30
ldint.texi Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldlang.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldlang.h SHF_LINK_ORDER fixup_link_order in ld 2021-01-13 22:06:02 +10:30
ldlex-wrapper.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldlex.h ld --defsym 2021-02-02 01:27:12 +10:30
ldlex.l ld --defsym 2021-02-02 01:27:12 +10:30
ldmain.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldmain.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldmisc.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldmisc.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldver.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldver.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
ldwrite.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldwrite.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
lexsup.c TRUE/FALSE simplification 2021-03-29 11:22:22 +10:30
libdep_plugin.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
MAINTAINERS Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
Makefile.am riscv --enable-targets=all on 32-bit host 2021-03-12 23:01:01 +10:30
Makefile.in riscv --enable-targets=all on 32-bit host 2021-03-12 23:01:01 +10:30
mri.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
mri.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
NEWS PR27451, -z start_stop_gc 2021-03-01 17:28:03 +10:30
pe-dll.c TRUE/FALSE simplification 2021-03-29 11:22:22 +10:30
pe-dll.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
pep-dll.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
pep-dll.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
plugin.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
plugin.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
README Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
stamp-h.in
sysdep.h Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
testplug2.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
testplug3.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
testplug4.c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
testplug.c ld: remove stray debug fprintf 2021-02-18 10:36:39 +00:00
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) 2012-2021 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.