binutils-gdb/ld
Nick Alcock 8592be8c7d ld: do not rely on the exact size of the CTF symtypetabs in test results
The data object and function info sections (collectively "symtypetabs")
usually (i.e. if non-indexed) have sizes defined by the size of the ELF
dynamic symbol table in the object they are linked to.  This means test
results should not depend on the exact sizes of these sections, because
adding entirely irrelevant symbols to the dynsym can cause spurious test
failures.  (This also means we should not match the offset of sections
that follow them, since those too depend on the exact size of the
symtypetab sections.)

Spotted by turning the sanitizer on, which introduced new dynsym entries
and expanded the symtypetab sizes to match.

ld/ChangeLog
2021-03-25  Nick Alcock  <nick.alcock@oracle.com>

	* testsuite/ld-ctf/array.d: Only check that the data object
	section is nonempty: do not check its exact size.
	* testsuite/ld-ctf/diag-parlabel.d: Likewise.
	* testsuite/ld-ctf/slice.d: Likewise.
	* testsuite/ld-ctf/data-func-conflicted.d: Likewise, and for the
	func info section too.
	* testsuite/ld-ctf/function.d: Likewise, for the func info section.
2021-03-25 16:32:53 +00:00
..
emulparams Remove arm-symbianelf 2021-02-09 23:36:16 +10:30
emultempl Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
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 ld: do not rely on the exact size of the CTF symtypetabs in test results 2021-03-25 16:32:53 +00:00
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-2019
ChangeLog-2020
ChangeLog-9197
ChangeLog-9899
config.in
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
configure.tgt Remove arm-symbianelf 2021-02-09 23:36:16 +10:30
deffile.h
deffilep.y
dep-in.sed
elf-hints-local.h
fdl.texi
gen-doc.texi
genscrba.sh
genscripts.sh
h8-doc.texi
ld.h
ld.texi PR27451, -z start_stop_gc 2021-03-01 17:28:03 +10:30
ldbuildid.c
ldbuildid.h
ldcref.c
ldctor.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldctor.h
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
ldemul.c
ldemul.h
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
ldgram.y ld --defsym 2021-02-02 01:27:12 +10:30
ldint.texi
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
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
ldmisc.c
ldmisc.h
ldver.c
ldver.h
ldwrite.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
ldwrite.h
lexsup.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
libdep_plugin.c
MAINTAINERS
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
mri.h
NEWS PR27451, -z start_stop_gc 2021-03-01 17:28:03 +10:30
pe-dll.c Add startswith function and use it instead of CONST_STRNEQ. 2021-03-22 11:01:43 +01:00
pe-dll.h
pep-dll.c
pep-dll.h
plugin.c
plugin.h
README
stamp-h.in
sysdep.h
testplug2.c
testplug3.c
testplug4.c
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.