binutils-gdb/bfd
H.J. Lu eebad48efe elf: Strip unreferenced weak undefined symbols
Linker will resolve an undefined symbol only if it is referenced by
relocation.  Unreferenced weak undefined symbols serve no purpose.
Weak undefined symbols appear in the dynamic symbol table only when they
are referenced by dynamic relocation.  Mark symbols with relocation and
strip undefined weak symbols if they don't have relocation and aren't
in the dynamic symbol table.

bfd/

	PR ld/31652
	* elf-bfd.h (elf_link_hash_entry): Add has_reloc.
	* elf-vxworks.c (elf_vxworks_emit_relocs): Set has_reloc.
	* elflink.c (_bfd_elf_link_output_relocs): Likewise.
	(elf_link_output_extsym): Strip undefined weak symbols if they
	don't have relocation and aren't in the dynamic symbol table.

ld/

	PR ld/31652
	* testsuite/ld-elf/elf.exp: Run undefweak tests.
	* testsuite/ld-elf/undefweak-1.rd: New file.
	* testsuite/ld-elf/undefweak-1a.s: Likewise.
	* testsuite/ld-elf/undefweak-1b.s: Likewise.
	* testsuite/ld-x86-64/weakundef-1.nd: Likewise.
	* testsuite/ld-x86-64/weakundef-1a.s: Likewise.
	* testsuite/ld-x86-64/weakundef-1b.s: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Run undefweak tests.
2024-04-18 19:17:17 -07:00
..
doc Remove bfdwin.c 2024-04-11 17:05:16 +09:30
hosts
po Remove bfdwin.c 2024-04-11 17:05:16 +09:30
.gitignore
acinclude.m4
aclocal.m4 mmap: Avoid the sanitizer configure check failure 2024-04-10 03:57:46 -07:00
aix5ppc-core.c
aout32.c
aout64.c
aout-cris.c
aout-ns32k.c
aout-target.h Remove bfdwin.c 2024-04-11 17:05:16 +09:30
aoutx.h Remove bfdwin.c 2024-04-11 17:05:16 +09:30
arc-got.h
arc-plt.def
arc-plt.h
archive64.c
archive.c
archures.c
ax_tls.m4
bfd-in2.h Avoid cache race in bfd_check_format_matches 2024-04-16 14:02:15 -06:00
bfd-in.h
bfd.c Avoid cache race in bfd_check_format_matches 2024-04-16 14:02:15 -06:00
bfd.m4
bfdio.c Remove debug printout from 9dd9181427 2024-04-16 11:59:41 +01:00
binary.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
bpf-reloc.def
cache.c Avoid cache race in bfd_check_format_matches 2024-04-16 14:02:15 -06:00
cf-i386lynx.c
ChangeLog
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-9193
ChangeLog-9495
ChangeLog-9697
ChangeLog-9899
cisco-core.c
coff64-rs6000.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
coff-aarch64.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
coff-alpha.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
coff-arm.c
coff-arm.h
coff-bfd.c
coff-bfd.h
coff-go32.c
coff-i386.c
coff-ia64.c
coff-loongarch64.c
coff-mcore.c
coff-mips.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
coff-riscv64.c
coff-rs6000.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
coff-sh.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
coff-stgo32.c
coff-tic4x.c
coff-tic30.c
coff-tic54x.c
coff-x86_64.c
coff-z8k.c
coff-z80.c
coffcode.h
coffgen.c
cofflink.c
coffswap.h
compress.c
config.bfd
config.in
configure mmap: Avoid the sanitizer configure check failure 2024-04-10 03:57:46 -07:00
configure.ac mmap: Avoid the sanitizer configure check failure 2024-04-10 03:57:46 -07:00
configure.com
configure.host
COPYING
corefile.c
cpu-aarch64.c
cpu-aarch64.h
cpu-alpha.c
cpu-amdgcn.c
cpu-arc.c
cpu-arm.c
cpu-arm.h
cpu-avr.c
cpu-bfin.c
cpu-bpf.c
cpu-cr16.c
cpu-cris.c
cpu-crx.c
cpu-csky.c
cpu-d10v.c
cpu-d30v.c
cpu-dlx.c
cpu-epiphany.c
cpu-fr30.c
cpu-frv.c
cpu-ft32.c
cpu-h8300.c
cpu-h8300.h
cpu-hppa.c
cpu-i386.c
cpu-ia64-opc.c
cpu-ia64.c
cpu-iamcu.c
cpu-ip2k.c
cpu-iq2000.c
cpu-kvx.c
cpu-lm32.c
cpu-loongarch.c
cpu-m9s12x.c
cpu-m9s12xg.c
cpu-m32c.c
cpu-m32r.c
cpu-m68hc11.c
cpu-m68hc12.c
cpu-m68k.c
cpu-m68k.h
cpu-m10200.c
cpu-m10300.c
cpu-mcore.c
cpu-mep.c
cpu-metag.c
cpu-microblaze.c
cpu-mips.c
cpu-mmix.c
cpu-moxie.c
cpu-msp430.c
cpu-mt.c
cpu-nds32.c
cpu-nfp.c
cpu-nios2.c
cpu-ns32k.c
cpu-or1k.c
cpu-pdp11.c
cpu-pj.c
cpu-powerpc.c
cpu-pru.c
cpu-riscv.c
cpu-riscv.h
cpu-rl78.c
cpu-rs6000.c
cpu-rx.c
cpu-s12z.c
cpu-s390.c
cpu-score.c
cpu-sh.c
cpu-sparc.c
cpu-spu.c
cpu-tic4x.c
cpu-tic6x.c
cpu-tic30.c
cpu-tic54x.c
cpu-tilegx.c
cpu-tilepro.c
cpu-v850_rh850.c
cpu-v850.c
cpu-vax.c
cpu-visium.c
cpu-wasm32.c
cpu-xgate.c
cpu-xstormy16.c
cpu-xtensa.c
cpu-z8k.c
cpu-z80.c
dep-in.sed
development.sh
dwarf1.c
dwarf2.c memory leak in bfd/dwarf2.c 2024-04-19 10:00:57 +09:30
ecoff-bfd.h
ecoff.c
ecofflink.c
ecoffswap.h
elf32-am33lin.c
elf32-arc.c ARC e_flags vs. objcopy 2024-04-17 09:25:15 +09:30
elf32-arm.c
elf32-arm.h
elf32-avr.c
elf32-avr.h
elf32-bfin.c
elf32-bfin.h
elf32-cr16.c
elf32-cr16.h
elf32-cris.c
elf32-crx.c
elf32-csky.c
elf32-csky.h
elf32-d10v.c
elf32-d30v.c
elf32-dlx.c
elf32-dlx.h
elf32-epiphany.c
elf32-fr30.c
elf32-frv.c
elf32-ft32.c
elf32-gen.c
elf32-h8300.c
elf32-hppa.c
elf32-hppa.h
elf32-i386.c
elf32-ip2k.c
elf32-iq2000.c
elf32-lm32.c
elf32-m32c.c
elf32-m32r.c
elf32-m68hc1x.c
elf32-m68hc1x.h
elf32-m68hc11.c
elf32-m68hc12.c
elf32-m68k.c
elf32-m68k.h
elf32-mcore.c
elf32-mep.c
elf32-metag.c
elf32-metag.h
elf32-microblaze.c
elf32-mips.c
elf32-moxie.c
elf32-msp430.c
elf32-mt.c
elf32-nds32.c
elf32-nds32.h
elf32-nios2.c
elf32-nios2.h
elf32-or1k.c
elf32-pj.c
elf32-ppc.c
elf32-ppc.h
elf32-pru.c
elf32-rl78.c
elf32-rx.c
elf32-rx.h
elf32-s12z.c
elf32-s390.c
elf32-score7.c
elf32-score.c
elf32-score.h
elf32-sh-relocs.h
elf32-sh.c
elf32-sparc.c
elf32-spu.c
elf32-spu.h
elf32-tic6x.c
elf32-tic6x.h
elf32-tilegx.c
elf32-tilegx.h
elf32-tilepro.c
elf32-tilepro.h
elf32-v850.c
elf32-v850.h
elf32-vax.c
elf32-visium.c
elf32-wasm32.c
elf32-xgate.c
elf32-xstormy16.c
elf32-xtensa.c
elf32-z80.c
elf32.c
elf64-alpha.c
elf64-amdgcn.c
elf64-bpf.c
elf64-gen.c
elf64-hppa.c HPPA64 linker: Do not force the generation of DT_FLAGS for Linux targets. 2024-04-18 13:24:42 +01:00
elf64-hppa.h
elf64-ia64-vms.c
elf64-mips.c
elf64-mmix.c
elf64-nfp.c
elf64-ppc.c
elf64-ppc.h
elf64-s390.c
elf64-sparc.c
elf64-tilegx.c
elf64-tilegx.h
elf64-x86-64.c
elf64.c
elf-attrs.c
elf-bfd.h elf: Strip unreferenced weak undefined symbols 2024-04-18 19:17:17 -07:00
elf-eh-frame.c
elf-hppa.h
elf-ifunc.c
elf-linker-x86.h
elf-linux-core.h
elf-m10200.c
elf-m10300.c
elf-nacl.c
elf-nacl.h
elf-properties.c
elf-s390-common.c
elf-s390.h
elf-sframe.c
elf-strtab.c
elf-vxworks.c elf: Strip unreferenced weak undefined symbols 2024-04-18 19:17:17 -07:00
elf-vxworks.h
elf.c Fix test for sections with different VMA<->LMA relationships so that it only applies to allocated sections, and only sections in the same segment are checked. 2024-04-16 17:54:13 +01:00
elfcode.h
elfcore.h
elflink.c elf: Strip unreferenced weak undefined symbols 2024-04-18 19:17:17 -07:00
elfn32-mips.c
elfnn-aarch64.c
elfnn-ia64.c
elfnn-kvx.c
elfnn-loongarch.c LoongArch: ld:Report an error when seeing an unrecognized relocation 2024-04-15 09:54:06 +08:00
elfnn-riscv.c
elfxx-aarch64.c
elfxx-aarch64.h
elfxx-ia64.c
elfxx-ia64.h
elfxx-kvx-relocs.h
elfxx-kvx.c
elfxx-kvx.h
elfxx-loongarch.c
elfxx-loongarch.h
elfxx-mips.c
elfxx-mips.h
elfxx-riscv.c RISC-V: Support Zcmp push/pop instructions. 2024-04-09 15:56:12 +08:00
elfxx-riscv.h
elfxx-sparc.c
elfxx-sparc.h
elfxx-target.h Remove bfdwin.c 2024-04-11 17:05:16 +09:30
elfxx-tilegx.c
elfxx-tilegx.h
elfxx-x86.c elf: Fix a memory leak in _bfd_elf_add_dynamic_entry 2024-04-10 19:50:01 -07:00
elfxx-x86.h
format.c Avoid cache race in bfd_check_format_matches 2024-04-16 14:02:15 -06:00
gen-aout.c
genlink.h
go32stub.h
hash.c
host-aout.c
hppabsd-core.c
hpux-core.c
i386aout.c
i386bsd.c
i386lynx.c
i386msdos.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
ihex.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
init.c
irix-core.c
libaout.h Remove bfdwin.c 2024-04-11 17:05:16 +09:30
libbfd-in.h Remove bfdwin.c 2024-04-11 17:05:16 +09:30
libbfd.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
libbfd.h Avoid cache race in bfd_check_format_matches 2024-04-16 14:02:15 -06:00
libcoff-in.h Remove bfdwin.c 2024-04-11 17:05:16 +09:30
libcoff.h Remove bfdwin.c 2024-04-11 17:05:16 +09:30
libecoff.h
libhppa.h
libpei.h
libxcoff.h
linker.c Re: PR26978, Inconsistency for strong foo@v1 and weak foo@@v1 2024-04-08 11:27:42 +09:30
lynx-core.c bfd: Define pagesize variables only for mmap 2024-04-09 05:22:41 -07:00
mach-o-aarch64.c
mach-o-arm.c
mach-o-i386.c
mach-o-target.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
mach-o-x86-64.c
mach-o.c
mach-o.h
MAINTAINERS
Makefile.am Remove bfdwin.c 2024-04-11 17:05:16 +09:30
Makefile.in Remove bfdwin.c 2024-04-11 17:05:16 +09:30
makefile.vms
mep-relocs.pl
merge.c
mmo.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
netbsd-core.c
netbsd.h
ns32k.h
ns32knetbsd.c
opncls.c Segfault in _bfd_delete_bfd with USE_MMAP 2024-04-11 09:32:10 +09:30
osf-core.c
pc532-mach.c
pdb.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
pdp11.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
pe-aarch64.c
pe-arm-wince.c
pe-arm.c
pe-i386.c
pe-mcore.c
pe-sh.c
pe-x86_64.c
pef-traceback.h
pef.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
pef.h
pei-aarch64.c
pei-arm-wince.c
pei-arm.c
pei-i386.c
pei-ia64.c
pei-loongarch64.c
pei-mcore.c
pei-riscv64.c
pei-sh.c
pei-x86_64.c
peicode.h
peXXigen.c
plugin.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
plugin.h
PORTING
ppcboot.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
ptrace-core.c
README
reloc16.c
reloc.c
rs6000-core.c
section.c
simple.c
som.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
som.h
srec.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
stab-syms.c
stabs.c
syms.c
sysdep.h
targets.c Thread-safety improvements for bfd_check_format_matches 2024-04-16 14:01:43 -06:00
targmatch.sed
tekhex.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
TODO
trad-core.c
vax1knetbsd.c
vaxnetbsd.c
verilog.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
version.h Automatic date update in version.in 2024-04-19 00:00:11 +00:00
version.m4
vms-alpha.c Re: Fix address violations when reading corrupt VMS records 2024-04-18 10:31:59 +09:30
vms-lib.c
vms-misc.c
vms.h
warning.m4
wasm-module.c
wasm-module.h
xcofflink.c
xcofflink.h
xsym.c Remove bfdwin.c 2024-04-11 17:05:16 +09:30
xsym.h
xtensa-dynconfig.c
xtensa-isa.c
xtensa-modules.c

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BFD is an object file library.  It permits applications to use the
same routines to process object files regardless of their format.

BFD is used by the GNU debugger, assembler, linker, and the binary
utilities.

The documentation on using BFD is scanty and may be occasionally
incorrect.  Pointers to documentation problems, or an entirely
rewritten manual, would be appreciated.

There is some BFD internals documentation in doc/bfdint.texi which may
help programmers who want to modify BFD.

BFD is normally built as part of another package.  See the build
instructions for that package, probably in a README file in the
appropriate directory.

BFD supports the following configure options:

  --target=TARGET
	The default target for which to build the library.  TARGET is
	a configuration target triplet, such as sparc-sun-solaris.
  --enable-targets=TARGET,TARGET,TARGET...
	Additional targets the library should support.  To include
	support for all known targets, use --enable-targets=all.
  --enable-64-bit-bfd
	Include support for 64 bit targets.  This is automatically
	turned on if you explicitly request a 64 bit target, but not
	for --enable-targets=all.  This requires a compiler with a 64
	bit integer type, such as gcc.
  --enable-shared
	Build BFD as a shared library.
  --with-mmap
	Use mmap when accessing files.  This is faster on some hosts,
	but slower on others.  It may not work on all hosts.

Report bugs in BFD to https://sourceware.org/bugzilla/

Patches are encouraged.  When sending patches, always send the output
of diff -u or diff -c from the original file to the new file.  Do not
send default diff output.  Do not make the diff from the new file to
the original file.  Remember that any patch must not break other
systems.  Remember that BFD must support cross compilation from any
host to any target, so patches which use ``#ifdef HOST'' are not
acceptable.  Please also read the ``Reporting Bugs'' section of the
gcc manual.

Bug reports without patches will be remembered, but they may never get
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Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
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