Remove an inconsistency in linker error message processing causing that
it depends on the ability to infer the name of the originating source
file whether or not the name of the offending function is repeated by
clever formatters for each issue reported within the function.
Taking the `ld/testsuite/ld-powerpc/tocopt7.s' test case source as an
example and the `powerpc-linux' target we have:
$ as -gdwarf2 -o tocopt.o -a64 tocopt.s
$ ld -o tocopt -melf64ppc tocopt.o
tocopt.o: In function `_start':
tocopt.s:35:(.text+0x14): toc optimization is not supported for 0x3fa00000 instruction.
tocopt.s:49:(.text+0x34): toc optimization is not supported for 0x3fa00000 instruction.
$
vs:
$ as -o tocopt.o -a64 tocopt.s
$ ld -o tocopt -melf64ppc tocopt.o
tocopt.o: In function `_start':
(.text+0x14): toc optimization is not supported for 0x3fa00000 instruction.
tocopt.o: In function `_start':
(.text+0x34): toc optimization is not supported for 0x3fa00000 instruction.
$
Similarly with the `mips-linux' target and this source:
$ cat jal-global-multi-overflow.s
.text
.set noreorder
.space 0x2000
.align 4
.globl foo
.ent foo
foo:
jal bar
nor $0, $0
jal bar
nor $0, $0
.end foo
.space 0x1ff0
.align 4
.globl bar
.ent bar
bar:
jal foo
nor $0, $0
jal foo
nor $0, $0
.end bar
$ as -o jal-global-multi-overflow.o jal-global-multi-overflow.s
$ ld -Ttext 0x1fffd000 -e foo -o jal-global-multi-overflow jal-global-multi-overflow.o
jal-global-multi-overflow.o: In function `foo':
(.text+0x2000): relocation truncated to fit: R_MIPS_26 against `bar'
jal-global-multi-overflow.o: In function `foo':
(.text+0x2008): relocation truncated to fit: R_MIPS_26 against `bar'
jal-global-multi-overflow.o: In function `bar':
(.text+0x4000): relocation truncated to fit: R_MIPS_26 against `foo'
jal-global-multi-overflow.o: In function `bar':
(.text+0x4008): relocation truncated to fit: R_MIPS_26 against `foo'
$
Not only this is inconsistent, but it causes output clutter as well with
redundant information.
The cause for this is a check in `vfinfo' the intent of which is to
print the function heading whenever (among others) the name of the
source file has changed, which however does not take into account a
situation where the name couldn't have been established both now and
previously.
Adjust the check then for this situation, yielding:
$ as -o tocopt.o -a64 tocopt.s
$ ld -o tocopt -melf64ppc tocopt.o
tocopt.o: In function `_start':
(.text+0x14): toc optimization is not supported for 0x3fa00000 instruction.
(.text+0x34): toc optimization is not supported for 0x3fa00000 instruction.
$
and:
$ as -o jal-global-multi-overflow.o jal-global-multi-overflow.s
$ ld -Ttext 0x1fffd000 -e foo -o jal-global-multi-overflow jal-global-multi-overflow.o
jal-global-multi-overflow.o: In function `foo':
(.text+0x2000): relocation truncated to fit: R_MIPS_26 against `bar'
(.text+0x2008): relocation truncated to fit: R_MIPS_26 against `bar'
jal-global-multi-overflow.o: In function `bar':
(.text+0x4000): relocation truncated to fit: R_MIPS_26 against `foo'
(.text+0x4008): relocation truncated to fit: R_MIPS_26 against `foo'
$
respectively instead. Adjust the test suite accordingly.
ld/
* ldmisc.c (vfinfo): Don't print the function name again either
if no source file name has been found both now and previously.
* testsuite/ld-cris/tls-err-20x.d: Adjust accordingly.
* testsuite/ld-mips-elf/mode-change-error-1.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch-mips16.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch-micromips.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch-r6-1.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch-2.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch-r6-2.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch-ignore-2.d: Likewise.
* testsuite/ld-mips-elf/unaligned-branch-ignore-mips16.d:
Likewise.
* testsuite/ld-mips-elf/unaligned-branch-ignore-micromips.d:
Likewise.
* testsuite/ld-mips-elf/unaligned-branch-ignore-r6-1.d:
Likewise.
* testsuite/ld-mips-elf/unaligned-jalx-addend-1.d: Likewise.
* testsuite/ld-mips-elf/unaligned-jalx-addend-mips16-1.d:
Likewise.
* testsuite/ld-mips-elf/unaligned-jalx-addend-micromips-1.d:
Likewise.
* testsuite/ld-mips-elf/unaligned-jalx-addend-3.d: Likewise.
* testsuite/ld-mips-elf/unaligned-jump.d: Likewise.
* testsuite/ld-mips-elf/unaligned-jump-mips16.d: Likewise.
* testsuite/ld-mips-elf/unaligned-jump-micromips.d: Likewise.
* testsuite/ld-mips-elf/unaligned-lwpc-1.d: Likewise.
* testsuite/ld-mips-elf/unaligned-ldpc-1.d: Likewise.
* testsuite/ld-powerpc/tocopt.out: Likewise.
* testsuite/ld-powerpc/tocopt7.out: Likewise.
Always turn hidden and internal symbols which have a dynamic index into
local ones. This is required by the the ELF gABI[1]:
"A hidden symbol contained in a relocatable object must be either
removed or converted to STB_LOCAL binding by the link-editor when the
relocatable object is included in an executable file or shared object."
"An internal symbol contained in a relocatable object must be either
removed or converted to STB_LOCAL binding by the link-editor when the
relocatable object is included in an executable file or shared object."
The ELF linker usually respects this requirement, however in the case
where a dynamic symbol has been preallocated due to a reference of the
default export class aka visibility from the object being linked, and
then merged with a hidden or internal symbol definition from within the
same object, then the original export class is carried over to the
output dynamic symbol table, because while merging the generic ELF
linker only converts affected dynamic symbols to local when they are
defined or referenced by the object being linked and a dynamic object
involved in the link both at a time.
The dynamic symbol produced confuses then the dynamic loader at the run
time -- the hidden or internal export class is ignored and the symbol
follows preemption rules as with the default export class.
In the MIPS target it happens when `mips_elf_record_global_got_symbol'
creates a dynamic symbol when a call relocation is encountered.
Additionally if the undefined symbol referred by such a relocation does
specify the intended export class, then a local dynamic symbol is
created instead, which is harmless and allowed, but useless. Normally
no local dynamic symbols are created, except for a single dummy one at
the beginning.
Correct the problem by removing the extra check for a dynamic symbol
being defined or referenced by the object being linked and a dynamic
object involved in the link both at a time. The test cases included
cover the internal and hidden symbol cases, as well as a protected
symbol for a reference, the handling of which is unchanged by this fix.
Both cases described above are covered, that is where an internal or
hidden dynamic symbol is produced and where a local one is.
NB this change affects CRIS results where some symbols in the static
table produced in a final link are now converted from STV_HIDDEN to
STB_LOCAL. This happens whenever the `elf_backend_hide_symbol' handler
is called, so the affected symbols must have been chosen for entering
into the dynamic symbol table, except in these test cases no such symbol
table is produced. In fully linked binaries the static symbol table is
only used for debugging though, so such a change is fine.
References:
[1] "System V Application Binary Interface - DRAFT - 24 April 2001",
The Santa Cruz Operation, Inc., "Symbol Table",
<http://www.sco.com/developers/gabi/2001-04-24/ch4.symtab.html>
bfd/
PR ld/19908
* elflink.c (elf_link_add_object_symbols): Always turn hidden
and internal symbols which have a dynamic index into local
ones.
ld/
PR ld/19908
* testsuite/ld-cris/tls-e-20.d: Adjust for hidden symbol
handling fix.
* testsuite/ld-cris/tls-e-20a.d: Likewise.
* testsuite/ld-cris/tls-e-21.d: Likewise.
* testsuite/ld-cris/tls-e-23.d: Likewise.
* testsuite/ld-cris/tls-e-80.d: Likewise.
* testsuite/ld-cris/tls-gd-3h.d: Likewise.
* testsuite/ld-cris/tls-leie-19.d: Likewise.
* testsuite/ld-mips-elf/export-class-ref-lib.sd: New test.
* testsuite/ld-mips-elf/export-hidden-ref.sd: New test.
* testsuite/ld-mips-elf/export-internal-ref.sd: New test.
* testsuite/ld-mips-elf/export-protected-ref.sd: New test.
* testsuite/ld-mips-elf/export-class-ref-f0.s: New test source.
* testsuite/ld-mips-elf/export-class-ref-f1.s: New test source.
* testsuite/ld-mips-elf/export-class-ref-f2.s: New test source.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
Running lang_common before garbage collection means slightly less work
in garbage collection code, since common symbols should no longer
appear there. It does have the side effect of keeping linker script
symbols (at least those defined outside of sections) global too,
hence some testsuite churn.
bfd/
PR 17165
* elf-bfd.h (ELF_COMMON_DEF): Note that this might be true for
linker script assignments too.
* elflink.c (elf_gc_sweep_symbol): Don't drop ELF_COMMON_DEF syms.
(bfd_elf_gc_mark_dynamic_ref_symbol): Similarly.
ld/
PR 17165
* ldlang.c (lang_process): Run lang_common before lang_gc_sections.
ld/testsuite/
* ld-gc/pr14265.d,
* ld-cris/tls-gc-68.d,
* ld-cris/tls-gc-69.d,
* ld-cris/tls-gc-70.d,
* ld-cris/tls-gc-71.d,
* ld-cris/tls-gc-75.d,
* ld-cris/tls-gc-76.d,
* ld-cris/tls-gc-79.d,
* ld-mmix/bpo-10.d,
* ld-mmix/bpo-11.d: Update.
Both readelf/objdump know how to get symbol version string for dynamic
symbols. This patch extracts this functionality into a separate
function and uses it to add symbol version string to versioned symbol
names when dumping dynamic relocations.
bfd/
PR binutils/16496
* elf-bfd.h (bfd_elf_get_symbol_version_string): New.
* elf.c (bfd_elf_get_symbol_version_string): New. Extracted
from bfd_elf_print_symbol.
(bfd_elf_print_symbol): Use it.
binutils/
PR binutils/16496
* objdump.c (objdump_print_symname): Call
bfd_elf_get_symbol_version_string to get ELF symbol version
string. Append version string if needed.
* readelf.c (versioned_symbol_info): New enum.
(get_symbol_version_string): New. Extracted from
process_symbol_table.
(dump_relocations): Add a new argument to indicate if dynamic
symbol table is used. Use get_symbol_version_string to get
symbol version string for dynamic symbol. Append version string
if needed.
(process_relocs): Updated dump_relocations call.
(process_symbol_table): Use get_symbol_version_string.
ld/testsuite/
PR binutils/16496
* ld-cris/weakref3.d: Add symbol version string to versioned
symbol names in dynamic relocation.
* ld-cris/weakref4.d: Likewise.
* ld-elfvers/vers24.rd: Likewise.
* ld-elf/pr16496a.c: New file.
* ld-elf/pr16496a.map: Likewise.
* ld-elf/pr16496b.c: Likewise.
* ld-elf/pr16496b.od: Likewise.
* ld-elf/shared.exp (build_tests): Add libpr16496a.so and
libpr16496b.so tests.
There's no real need to emit these always: They're needed only if we
indeed want to emit a localized symbol. Hence defer emission until we
at least did the basic early checks that would lead to no such symbol
getting emitted. This in particular avoids emitting such a symbol in
the majority of (if not all) "ld -r" cases.
I hope my set of cross build tests caught all the test cases needing
adjustment - please forgive if I missed a few.
bfd/
2013-10-29 Jan Beulich <jbeulich@suse.com>
* elflink.c (struct elf_outext_info): Add field file_sym_done.
(bfd_elf_final_link): Initialize new field. Move fake STT_FILE
symbol emission from here ...
(elf_link_output_extsym): ... to here.
gas/testsuite/
2013-10-29 Jan Beulich <jbeulich@suse.com>
* gas/microblaze/relax_size.elf: Drop expectation of no longer
present STT_FILE symbol.
* gas/microblaze/relax_size2.elf: Likewise.
ld/testsuite/
2013-10-29 Jan Beulich <jbeulich@suse.com>
* ld-cris/tls-e-tpoffcomm1.d: Drop expectation of no longer
present STT_FILE symbol.
* ld-mmix/bpo-18.d: Likewise.
* ld-mmix/bpo-22.d: Likewise.
* ld-mmix/greg-6.d: Likewise.
* ld-mmix/greg-7.d: Likewise.
* ld-mmix/loc4.d: Likewise.
* ld-mmix/local1.d: Likewise.
* ld-mmix/local3.d: Likewise.
* ld-mmix/local5.d: Likewise.
* ld-mmix/local7.d: Likewise.
* ld-mmix/loct-1.d: Likewise.
* ld-sh/sh64/abi32.xd: Likewise.
* ld-sh/sh64/abi64.xd: Likewise.
* ld-sh/sh64/cmpct1.xd: Likewise.
* ld-sh/sh64/crange1.rd: Likewise.
* ld-sh/sh64/crange2.rd: Likewise.
* ld-sh/sh64/crange3-cmpct.rd: Likewise.
* ld-sh/sh64/crange3-media.rd: Likewise.
* ld-sh/sh64/crange3.rd: Likewise.
* ld-sh/sh64/crangerel1.rd: Likewise.
* ld-sh/sh64/crangerel2.rd: Likewise.
* ld-sh/sh64/mix1.xd: Likewise.
* ld-sh/sh64/mix2.xd: Likewise.
* ld-sh/sh64/shdl32.xd: Likewise.
* ld-sh/sh64/shdl64.xd: Likewise.
* elflink.c (elf_link_input_bfd): Provide a file symbol for
each input file with local syms, if the input lacks such.
(bfd_elf_final_link): Add a file symbol to mark end of locals
for which we can associate with input files.
(struct elf_final_link_info): Add filesym_count field.
(struct elf_outext_info): Add need_second_pass and second_pass.
(elf_link_output_extsym): Detect symbols defined in the output
file, emit them on second pass over locals.
ld/testsuite/
Update to suit added STT_FILE symbols.
* ldlang.c (lang_process): Rerun lang_do_assignments before
starting garbage collection.
* ldexp.c (fold_name): Generate a reloc for defined symbols
found without an associated output section during the mark phase.
(exp_fold_tree_1): Continue processing an expression, even if we
are unable to fold it, if we are in the first two evaluation
phases.
* ldexp.h (enum lang_phase_type): Add descriptions of the phases.
* ld-gc/pr13683.c: New test source file.
* ld-gc/pr13683.d: New test control and output file.
* ld-gc/gc.exp: Run the pr13683 test.
* ld-cris/tls-gc-68: Update expected symbol table dump.
* ld-cris/tls-gc-69: Likewise.
* ld-cris/tls-gc-70: Likewise.
* ld-cris/tls-gc-71: Likewise.
* ld-cris/tls-gc-75: Likewise.
* ld-cris/tls-gc-76.d: Likewise.
* ld-cris/tls-gc-79.d: Likewise.
ld-cris/tls-e-23.d, ld-cris/tls-e-66.d, ld-cris/tls-gd-3.d,
ld-cris/tls-gd-3h.d, ld-cris/tls-global-74.d,
ld-cris/tls-ie-8e1.d, ld-cris/tls-ldgde-14.d,
ld-cris/tls-ldgde-15.d, ld-cris/tls-le-12.d, ld-cris/tls-le-13.d,
ld-cris/tls-le-13s.d, ld-cris/tls-legd-16.d,
ld-cris/tls-legd-17.d, ld-cris/tls-legdx-16.d,
ld-cris/tls-legdx-17.d, ld-cris/tls-leie-18.d,
ld-cris/tls-leie-19.d, ld-cris/tls-local-57.d,
ld-cris/tls-local-58.d, ld-cris/tls-local-59.d: Adjust for
relocation value now offset by negative program TLS block size.
* ld-cris/tls-le-12s.d: Ditto. Move 128-byte tls-data to last.
Adjust accordingly.
* ld-cris/tls-le-12s.s: Use movs, not movu, for sign-extended
always-negative relocation.
* ld-cris/tls-tprelm.s: Move filler data to after symbol for
tested relocation.
* ld-cris/tls-ok-36.d: Adjust accordingly.
Hans-Peter Nilsson
Maciej W. Rozycki
Alan Modra
Nick Clifton
H.J. Lu
Jan Beulich
Hans-Peter Nilsson