To call an external function, the direct branch to the PLT entry can be
replaced by an indirect branch via the GOT slot, which is similar to the
first instruction in the PLT slot. Instead using the PLT slot as function
address, the function address is retrieved from the GOT slot. If linker
determines the function is defined locally, it converts indirect branch
via the GOT slot to direct branch with a nop prefix and converts load via
the GOT slot to load immediate or lea,
* testsuite/ld-x86-64/libno-plt-1b.dd: Likewise.
* testsuite/ld-x86-64/libno-plt-1b.rd: Likewise.
* testsuite/ld-x86-64/no-plt-1a.dd: Likewise.
* testsuite/ld-x86-64/no-plt-1a.rd: Likewise.
* testsuite/ld-x86-64/no-plt-1b.dd: Likewise.
* testsuite/ld-x86-64/no-plt-1b.rd: Likewise.
* testsuite/ld-x86-64/no-plt-1c.dd: Likewise.
* testsuite/ld-x86-64/no-plt-1c.rd: Likewise.
* testsuite/ld-x86-64/no-plt-1d.dd: Likewise.
* testsuite/ld-x86-64/no-plt-1d.rd: Likewise.
* testsuite/ld-x86-64/no-plt-1e.dd: Likewise.
* testsuite/ld-x86-64/no-plt-1e.rd: Likewise.
* testsuite/ld-x86-64/no-plt-1f.dd: Likewise.
* testsuite/ld-x86-64/no-plt-1f.rd: Likewise.
* testsuite/ld-x86-64/no-plt-1g.dd: Likewise.
* testsuite/ld-x86-64/no-plt-1g.rd: Likewise.
* testsuite/ld-x86-64/no-plt-check1.S: Likewise.
* testsuite/ld-x86-64/no-plt.exp: Likewise.
* testsuite/ld-x86-64/no-plt-extern1.S: Likewise.
* testsuite/ld-x86-64/no-plt-func1.c: Likewise.
* testsuite/ld-x86-64/no-plt-main1.c: Likewise.
Revert the addition of `ft32-*-*' to this test case made with commit
d1f70bdcab ("Fix lots of linker testsuite failures for the FT32
target.") as this case scores an XPASS now.
ld/
* testsuite/ld-elf/init-fini-arrays.d: Remove `ft32-*-*' xfail.
Embedding the .plt section in another revealed a bug in the way the
larl operand of the first magic plt entry is being calculated. Fixed
with the attached patch.
bfd/ChangeLog:
* elf64-s390.c (elf_s390_finish_dynamic_sections): Subtract plt
section offset when calculation the larl operand in the first PLT
entry.
ld/ChangeLog:
* testsuite/ld-s390/pltoffset-1.dd: New test.
* testsuite/ld-s390/pltoffset-1.ld: New test.
* testsuite/ld-s390/pltoffset-1.s: New test.
* testsuite/ld-s390/s390.exp: Run new test.
VLE is an encoding, not a particular processor architecture, so it
isn't really proper to select insns based on PPC_OPCODE_VLE. For
example
{"evaddw", VX (4, 512), VX_MASK, PPCSPE|PPCVLE, PPCNONE, {RS, RA, RB}},
{"vaddubs", VX (4, 512), VX_MASK, PPCVEC|PPCVLE, PPCNONE, {VD, VA, VB}},
shows two insns that have the same encoding, both available with VLE.
Enabling both with VLE means we can't disassemble the second variant
even if -Maltivec is given rather than -Mspe. Also, we don't check
user assembly against the processor type as well as we could.
Another problem is that when using the VLE encoding, insns from the
main ppc opcode table are not available, except those using opcode 4
and 31. Correcting this revealed two errors in the ld testsuite,
use of "nop" and "rfmci" when -mvle.
This patch fixes those problems in the opcode table, and removes
PPCNONE. I find a plain 0 distracts less from other values.
In addition, I've implemented code to recognize some machine values
from the apuinfo note present in ppc32 objects. It's not a complete
disambiguation since we're lacking info to detect newer chips, but
what we have should help with disassembly.
include/
* elf/ppc.h (APUINFO_SECTION_NAME, APUINFO_LABEL, PPC_APUINFO_ISEL,
PPC_APUINFO_PMR, PPC_APUINFO_RFMCI, PPC_APUINFO_CACHELCK,
PPC_APUINFO_SPE, PPC_APUINFO_EFS, PPC_APUINFO_BRLOCK,
PPC_APUINFO_VLE: Define.
opcodes/
* ppc-dis.c (ppc_opts): Delete extraneous parentheses. Default
cpu for "vle" to e500.
* ppc-opc.c (ALLOW8_SPRG): Remove PPC_OPCODE_VLE.
(NO371, PPCSPE, PPCISEL, PPCEFS, MULHW, DCBT_EO): Likewise.
(PPCNONE): Delete, substitute throughout.
(powerpc_opcodes): Remove PPCVLE from "flags". Add to "deprecated"
except for major opcode 4 and 31.
(vle_opcodes <se_rfmci>): Add PPCRFMCI to flags.
bfd/
* cpu-powerpc.c (powerpc_compatible): Allow bfd_mach_ppc_vle entry
to match other 32-bit archs.
* elf32-ppc.c (_bfd_elf_ppc_set_arch): New function.
(ppc_elf_object_p): Call it.
(ppc_elf_special_sections): Use APUINFO_SECTION_NAME. Fix
overlong line.
(APUINFO_SECTION_NAME, APUINFO_LABEL): Don't define here.
* elf64-ppc.c (ppc64_elf_object_p): Call _bfd_elf_ppc_set_arch.
* bfd-in.h (_bfd_elf_ppc_at_tls_transform,
_bfd_elf_ppc_at_tprel_transform): Move to..
* elf-bfd.h: ..here.
(_bfd_elf_ppc_set_arch): Declare.
* bfd-in2.h: Regenerate.
gas/
* config/tc-ppc.c (PPC_APUINFO_ISEL, PPC_APUINFO_PMR,
PPC_APUINFO_RFMCI, PPC_APUINFO_CACHELCK, PPC_APUINFO_SPE,
PPC_APUINFO_EFS, PPC_APUINFO_BRLOCK, PPC_APUINFO_VLE): Don't define.
(ppc_setup_opcodes): Check vle disables powerpc_opcodes overridden
by vle_opcodes, and that vle flag doesn't enable opcodes. Don't
add vle_opcodes twice.
(ppc_cleanup): Use APUINFO_SECTION_NAME and APUINFO_LABEL.
ld/
* testsuite/ld-powerpc/apuinfo1.s: Delete nop.
* testsuite/ld-powerpc/apuinfo-vle2.s: New.
* testsuite/ld-powerpc/powerpc.exp: Use apuinfo-vle2.s.
We can generate x86-64 TLS code sequences for general and local dynamic
models without PLT, which uses indirect call via GOT:
call *__tls_get_addr@GOTPCREL(%rip)
instead of direct call:
call __tls_get_addr[@PLT]
Since direct call is 4-byte long and indirect call, is 5-byte long, the
extra one byte must be handled properly.
For general dynamic model, one 0x66 prefix before call instruction is
removed to make room for indirect call. For local dynamic model, we
simply use 5-byte indirect call.
TLS linker optimization is updated to recognize new instruction patterns.
For local dynamic model to local exec model transition, we generate
4 0x66 prefixes, instead of 3, before mov instruction in 64-bit and
generate a 5-byte nop, instead of 4-byte, before mov instruction in
32-bit. Since linker may convert
call *__tls_get_addr@GOTPCREL(%rip)
to
addr32 call __tls_get_addr
when producing static executable, both patterns are recognized.
bfd/
* elf64-x86-64.c (elf_x86_64_link_hash_entry): Add tls_get_addr.
(elf_x86_64_link_hash_newfunc): Initialize tls_get_addr to 2.
(elf_x86_64_check_tls_transition): Check indirect call and
direct call with the addr32 prefix for general and local dynamic
models. Set the tls_get_addr feild.
(elf_x86_64_convert_load_reloc): Always use addr32 prefix for
indirect __tls_get_addr call via GOT.
(elf_x86_64_relocate_section): Handle GD->LE, GD->IE and LD->LE
transitions with indirect call and direct call with the addr32
prefix.
ld/
* testsuite/ld-x86-64/pass.out: New file.
* testsuite/ld-x86-64/tls-def1.c: Likewise.
* testsuite/ld-x86-64/tls-gd1.S: Likewise.
* testsuite/ld-x86-64/tls-ld1.S: Likewise.
* testsuite/ld-x86-64/tls-main1.c: Likewise.
* testsuite/ld-x86-64/tls.exp: Likewise.
* testsuite/ld-x86-64/tlsbin2-nacl.rd: Likewise.
* testsuite/ld-x86-64/tlsbin2.dd: Likewise.
* testsuite/ld-x86-64/tlsbin2.rd: Likewise.
* testsuite/ld-x86-64/tlsbin2.sd: Likewise.
* testsuite/ld-x86-64/tlsbin2.td: Likewise.
* testsuite/ld-x86-64/tlsbinpic2.s: Likewise.
* testsuite/ld-x86-64/tlsgd10.dd: Likewise.
* testsuite/ld-x86-64/tlsgd10.s: Likewise.
* testsuite/ld-x86-64/tlsgd11.dd: Likewise.
* testsuite/ld-x86-64/tlsgd11.s: Likewise.
* testsuite/ld-x86-64/tlsgd12.d: Likewise.
* testsuite/ld-x86-64/tlsgd12.s: Likewise.
* testsuite/ld-x86-64/tlsgd13.d: Likewise.
* testsuite/ld-x86-64/tlsgd13.s: Likewise.
* testsuite/ld-x86-64/tlsgd14.dd: Likewise.
* testsuite/ld-x86-64/tlsgd14.s: Likewise.
* testsuite/ld-x86-64/tlsgd5c.s: Likewise.
* testsuite/ld-x86-64/tlsgd6c.s: Likewise.
* testsuite/ld-x86-64/tlsgd9.dd: Likewise.
* testsuite/ld-x86-64/tlsgd9.s: Likewise.
* testsuite/ld-x86-64/tlsld4.dd: Likewise.
* testsuite/ld-x86-64/tlsld4.s: Likewise.
* testsuite/ld-x86-64/tlsld5.dd: Likewise.
* testsuite/ld-x86-64/tlsld5.s: Likewise.
* testsuite/ld-x86-64/tlsld6.dd: Likewise.
* testsuite/ld-x86-64/tlsld6.s: Likewise.
* testsuite/ld-x86-64/tlspic2-nacl.rd: Likewise.
* testsuite/ld-x86-64/tlspic2.dd: Likewise.
* testsuite/ld-x86-64/tlspic2.rd: Likewise.
* testsuite/ld-x86-64/tlspic2.sd: Likewise.
* testsuite/ld-x86-64/tlspic2.td: Likewise.
* testsuite/ld-x86-64/tlspic3.s: Likewise.
* testsuite/ld-x86-64/tlspie2.s: Likewise.
* testsuite/ld-x86-64/tlspie2a.d: Likewise.
* testsuite/ld-x86-64/tlspie2b.d: Likewise.
* testsuite/ld-x86-64/tlspie2c.d: Likewise.
* testsuite/ld-x86-64/tlsgd5.dd: Updated.
* testsuite/ld-x86-64/tlsgd6.dd: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run libtlspic2.so, tlsbin2,
tlsgd5b, tlsgd6b, tlsld4, tlsld5, tlsld6, tlsgd9, tlsgd10,
tlsgd11, tlsgd14, tlsgd12, tlsgd13, tlspie2a, tlspie2b and
tlspie2c.
bfd/
* coff-z8k.c (extra_case): Fix range check for R_JR relocation.
ld/
* ld/testsuite/ld-z8k/0filler.s: New file.
* ld/testsuite/ld-z8k/branch-target.s: New file.
* ld/testsuite/ld-z8k/branch-target2.s: New file.
* ld/testsuite/ld-z8k/calr-back-8001.d: New file.
* ld/testsuite/ld-z8k/calr-back-8002.d: New file.
* ld/testsuite/ld-z8k/calr-back-fail-8001.d: New file.
* ld/testsuite/ld-z8k/calr-back-fail-8002.d: New file.
* ld/testsuite/ld-z8k/calr-forw-8001.d: New file.
* ld/testsuite/ld-z8k/calr-forw-8002.d: New file.
* ld/testsuite/ld-z8k/calr-forw-fail-8001.d: New file.
* ld/testsuite/ld-z8k/calr-forw-fail-8002.d: New file.
* ld/testsuite/ld-z8k/calr-opcode.s: New file.
* ld/testsuite/ld-z8k/dbjnz-forw-8001.d: New file.
* ld/testsuite/ld-z8k/dbjnz-forw-8002.d: New file.
* ld/testsuite/ld-z8k/dbjnz-forw-fail-8001.d: New file.
* ld/testsuite/ld-z8k/dbjnz-forw-fail-8002.d: New file.
* ld/testsuite/ld-z8k/dbjnz-opcode.s: New file.
* ld/testsuite/ld-z8k/djnz-back-8001.d: New file.
* ld/testsuite/ld-z8k/djnz-back-8002.d: New file.
* ld/testsuite/ld-z8k/djnz-back-fail-8001.d: New file.
* ld/testsuite/ld-z8k/djnz-back-fail-8002.d: New file.
* ld/testsuite/ld-z8k/djnz-forw-8001.d: New file.
* ld/testsuite/ld-z8k/djnz-forw-8002.d: New file.
* ld/testsuite/ld-z8k/djnz-forw-fail-8001.d: New file.
* ld/testsuite/ld-z8k/djnz-forw-fail-8002.d: New file.
* ld/testsuite/ld-z8k/djnz-opcode.s: New file.
* ld/testsuite/ld-z8k/filler.s: New file.
* ld/testsuite/ld-z8k/jr-back-8001.d: New file.
* ld/testsuite/ld-z8k/jr-back-8002.d: New file.
* ld/testsuite/ld-z8k/jr-back-fail-8001.d: New file.
* ld/testsuite/ld-z8k/jr-back-fail-8002.d: New file.
* ld/testsuite/ld-z8k/jr-forw-8001.d: New file.
* ld/testsuite/ld-z8k/jr-forw-8002.d: New file.
* ld/testsuite/ld-z8k/jr-forw-fail-8001.d: New file.
* ld/testsuite/ld-z8k/jr-forw-fail-8002.d: New file.
* ld/testsuite/ld-z8k/jr-opcode.s: New file.
* ld/testsuite/ld-z8k/ldr-back-8001.d: New file.
* ld/testsuite/ld-z8k/ldr-back-8002.d: New file.
* ld/testsuite/ld-z8k/ldr-back-fail-8001.d: New file.
* ld/testsuite/ld-z8k/ldr-back-fail-8002.d: New file.
* ld/testsuite/ld-z8k/ldr-forw-8001.d: New file.
* ld/testsuite/ld-z8k/ldr-forw-8002.d: New file.
* ld/testsuite/ld-z8k/ldr-forw-fail-8001.d: New file.
* ld/testsuite/ld-z8k/ldr-forw-fail-8002.d: New file.
* ld/testsuite/ld-z8k/ldr-opcode.s: New file.
* ld/testsuite/ld-z8k/ldrb-forw-8001.d: New file.
* ld/testsuite/ld-z8k/ldrb-forw-8002.d: New file.
* ld/testsuite/ld-z8k/ldrb-forw-fail-8001.d: New file.
* ld/testsuite/ld-z8k/ldrb-forw-fail-8002.d: New file.
* ld/testsuite/ld-z8k/ldrb-opcode.s: New file.
* ld/testsuite/ld-z8k/ldrb-opcode2.s: New file.
* ld/testsuite/ld-z8k/other-file.s: New file.
* ld/testsuite/ld-z8k/reloc.dd: New file.
* ld/testsuite/ld-z8k/reloc.ld: New file.
* ld/testsuite/ld-z8k/relocseg.dd: New file.
* ld/testsuite/ld-z8k/relocseg.ld: New file.
* ld/testsuite/ld-z8k/relocseg1.dd: New file.
* ld/testsuite/ld-z8k/test-ld.sh: New file.
* ld/testsuite/ld-z8k/this-file.s: New file.
* ld/testsuite/ld-z8k/z8k.exp: New file.
Fix internal errors like:
ld: BFD (GNU Binutils) 2.26.51.20160526 internal error, aborting at .../bfd/elfxx-mips.c:10278 in _bfd_mips_elf_relocate_section
ld: Please report this bug.
triggered by the `bfd_reloc_outofrange' condition on branch relocations.
bfd/
* elfxx-mips.c (b_reloc_p): New function.
(_bfd_mips_elf_relocate_section) <bfd_reloc_outofrange>: Handle
branch relocations.
ld/
* testsuite/ld-mips-elf/unaligned-branch.d: New test.
* testsuite/ld-mips-elf/unaligned-branch.s: New test source.
* testsuite/ld-mips-elf/unaligned-text.s: New test source.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new test.
The original MIPS SVR4 psABI defines the calculation for the R_MIPS_26
relocation in a complex way, as follows[1]:
Name Value Field Symbol Calculation
R_MIPS_26 4 T-targ26 local (((A << 2) | \
(P & 0xf0000000)) + S) >> 2
4 T-targ26 external (sign-extend(A << 2) + S) >> 2
This is further clarified, by correcting typos (already applied in the
excerpt above) in the 64-bit psABI extension[2]. A note is included in
both documents to specify that for the purpose of relocation processing
a local symbol is one with binding STB_LOCAL and type STT_SECTION, and
otherwise, a symbol is external.
We have both calculations implemented for the R_MIPS_26 relocation, and
by extension also for the R_MIPS16_26 and R_MICROMIPS_26_S1 relocations,
from now on collectively called jump relocations. However our code uses
a different condition to tell local and external symbols apart, that is
it only checks for the STB_LOCAL binding and ignores the symbol type,
however for REL relocations only. The external calculation is used for
all RELA jump relocations.
In reality the difference matters for jump relocations referring local
MIPS16 and, as from recent commit 44d3da2338 ("MIPS/GAS: Treat local
jump relocs the same no matter if REL or RELA"), also local microMIPS
symbols. Such relocations are not converted to refer to corresponding
section symbols instead and retain the original local symbol reference.
It can be inferred from the relocation calculation definitions that the
addend is effectively unsigned for the local case and explicitly signed
for the external case. With the REL relocation format it makes sense
given the limited range provided for by the field being relocated: the
use of an unsigned addend expands the range by one bit for the local
case, because a negative offset from a section symbol makes no sense,
and any usable negative offset from the original local symbol will have
worked out positive if converted to a section-relative reference. In
the external case a signed addend gives more flexibility as offsets both
negative and positive can be used with a symbol. Any such offsets will
typically have a small value.
The inclusion of the (P & 0xf0000000) component, ORed in the calculation
in the local case, seems questionable as bits 31:28 are not included in
the relocatable field and are masked out as the relocation is applied.
Their value is therefore irrelevant for output processing, the relocated
field ends up the same regardless of their value. They could be used
for overflow detection, however this is precluded by adding them to bits
31:28 of the symbol referred, as the sum will not correspond to the
value calculated by the processor at run time whenever bits 31:28 of the
symbol referred are not all zeros, even though it is valid as long they
are the same as bits 31:28 of P.
We deal with this problem by ignoring any overflow resulting from the
local calculation. This however makes us miss genuine overflow cases,
where 31:28 of the symbol referred are different from bits 31:28 of P,
and non-functional code is produced.
Given the situation, for the purpose of overflow detection we can change
our code to follow the original psABI and only treat the in-place addend
as unsigned in the section symbol case, permitting jumps to offsets
128MiB and above into section. Sections so large may be uncommon, but
still a reasonable use case. On the other hand such large offsets from
regular local symbols are not expected and it makes sense to support
(possibly small) negative offsets instead, also in consistency with what
we do for global symbols.
Drop the (P & 0xf0000000) component then, treat the addend as signed
with local non-section symbols and also detect an overflow in the result
of such calculation with local symbols. NB it does not affect the value
computed for the relocatable field, it only affects overflow detection.
References:
[1] "SYSTEM V APPLICATION BINARY INTERFACE, MIPS RISC Processor
Supplement, 3rd Edition", Figure 4-11: "Relocation Types", p. 4-19
<http://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf>
[2] "64-bit ELF Object File Specification, Draft Version 2.5", Table 32
"Relocation Types", p. 45
<http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf>
bfd/
* elfxx-mips.c (mips_elf_calculate_relocation): <R_MIPS16_26>
<R_MIPS_26, R_MICROMIPS_26_S1>: Drop the region bits of the
reloc location from calculation, treat the addend as signed with
local non-section symbols and enable overflow detection.
ld/
* testsuite/ld-mips-elf/jal-global-overflow-0.d: New test.
* testsuite/ld-mips-elf/jal-global-overflow-1.d: New test.
* testsuite/ld-mips-elf/jal-local-overflow-0.d: New test.
* testsuite/ld-mips-elf/jal-local-overflow-1.d: New test.
* testsuite/ld-mips-elf/jal-global-overflow.s: New test source.
* testsuite/ld-mips-elf/jal-local-overflow.s: New test source.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
On RELA targets the addend can affect JALX target's alignment, so only
verify it once the whole relocation calculation has completed.
bfd/
* elfxx-mips.c (mips_elf_calculate_relocation) <R_MIPS16_26>
<R_MIPS_26, R_MICROMIPS_26_S1>: Include the addend in JALX's
target alignment verification.
ld/
* testsuite/ld-mips-elf/unaligned-jalx-addend-0.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-addend-1.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-addend-mips16-0.d: New
test.
* testsuite/ld-mips-elf/unaligned-jalx-addend-mips16-1.d: New
test.
* testsuite/ld-mips-elf/unaligned-jalx-addend-micromips-0.d: New
test.
* testsuite/ld-mips-elf/unaligned-jalx-addend-micromips-1.d: New
test.
* testsuite/ld-mips-elf/unaligned-jalx-addend-0.s: New test
source.
* testsuite/ld-mips-elf/unaligned-jalx-addend-1.s: New test
source.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
Symbol table entries for section symbols are different between IRIX and
traditional MIPS ELF targets in that IRIX entries have their `st_name'
member pointing at the section's name in the string table section, while
traditional entries have 0 there and the section header string table has
to be referred via the relevant section header's `shn_name' member
instead.
This is chosen with the `elf_backend_name_local_section_symbols' backend
and can be observed with `readelf -s' output for an IRIX object:
Symbol table '.symtab' contains 12 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 SECTION LOCAL DEFAULT 1 .text
2: 00000000 0 SECTION LOCAL DEFAULT 3 .data
3: 00000000 0 SECTION LOCAL DEFAULT 4 .bss
4: 00000000 0 SECTION LOCAL DEFAULT 5 .reginfo
5: 00000000 0 SECTION LOCAL DEFAULT 6 .MIPS.abiflags
6: 00000000 0 SECTION LOCAL DEFAULT 7 .pdr
7: 00000000 0 SECTION LOCAL DEFAULT 9 .gnu.attributes
8: 00002000 16 FUNC GLOBAL DEFAULT 1 foo
9: 00004008 0 FUNC LOCAL DEFAULT 1 abar
10: 00002008 0 FUNC LOCAL DEFAULT 1 afoo
11: 00004000 16 FUNC GLOBAL DEFAULT 1 bar
and a corresponding traditional object:
Symbol table '.symtab' contains 12 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 SECTION LOCAL DEFAULT 1
2: 00000000 0 SECTION LOCAL DEFAULT 3
3: 00000000 0 SECTION LOCAL DEFAULT 4
4: 00004008 0 FUNC LOCAL DEFAULT 1 abar
5: 00002008 0 FUNC LOCAL DEFAULT 1 afoo
6: 00000000 0 SECTION LOCAL DEFAULT 5
7: 00000000 0 SECTION LOCAL DEFAULT 6
8: 00000000 0 SECTION LOCAL DEFAULT 7
9: 00000000 0 SECTION LOCAL DEFAULT 9
10: 00002000 16 FUNC GLOBAL DEFAULT 1 foo
11: 00004000 16 FUNC GLOBAL DEFAULT 1 bar
respectively. Consequently the right way to retrieve a section symbol's
name has to be chosen in `mips_elf_calculate_relocation' for the purpose
of error reporting.
Originally we produced symbol tables in the traditional object format
only and we handled it correctly until it was lost in a rewrite with:
commit 7403cb6305
Author: Mark Mitchell <mark@codesourcery.com>
Date: Wed Jun 30 20:13:43 1999 +0000
probably because of the extra pointer indirection added which made the
same expression have a different meaning.
With the addition of IRIX symbol table format with:
commit 174fd7f955
Author: Richard Sandiford <rdsandiford@googlemail.com>
Date: Mon Feb 9 08:04:00 2004 +0000
the bug has been partially covered and now when a relocation error is
triggered with an IRIX object the offending section symbol is correctly
reported:
tmpdir/dump0.o: In function `foo':
(.text+0x2000): relocation truncated to fit: R_MIPS_26 against `.text'
tmpdir/dump0.o: In function `bar':
(.text+0x4000): relocation truncated to fit: R_MIPS_26 against `.text'
because `bfd_elf_string_from_elf_section' retrieves the name from the
string table section. With a traditional object however the function
returns an empty string and consequently `no symbol' is printed instead:
tmpdir/dump0.o: In function `foo':
(.text+0x2000): relocation truncated to fit: R_MIPS_26 against `no symbol'
tmpdir/dump0.o: In function `bar':
(.text+0x4000): relocation truncated to fit: R_MIPS_26 against `no symbol'
Restore the original semantics so that the section name is always
correctly retrieved.
bfd/
* elfxx-mips.c (mips_elf_calculate_relocation): Also use the
section name if `bfd_elf_string_from_elf_section' returns an
empty string.
ld/
* testsuite/ld-mips-elf/reloc-local-overflow.d: New test.
* testsuite/ld-mips-elf/reloc-local-overflow.s: Source for the
new test.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new test.
Upon a `bfd_reloc_outofrange' error continue processing so that any
further issues are also reported, similarly to how `bfd_reloc_overflow'
is handled. Adjust message formatting accordingly, using `%X' to abort
processing at conclusion.
Reduce the number of test cases by grouping relocations the handling of
which can now be verified together with a single source and dump.
bfd/
* elfxx-mips.c (_bfd_mips_elf_relocate_section)
<bfd_reloc_outofrange>: Use the `%X%H' rather than `%C' format
for message. Continue processing rather than returning failure.
ld/
* testsuite/ld-mips-elf/unaligned-jalx-0.d: Fold
`unaligned-jalx-2' here.
* testsuite/ld-mips-elf/unaligned-jalx-mips16-0.d: Fold
`unaligned-jalx-mips16-2' here.
* testsuite/ld-mips-elf/unaligned-jalx-micromips-0.d: Fold
`unaligned-jalx-micromips-2' here.
* testsuite/ld-mips-elf/unaligned-jalx-0.s: Update accordingly.
* testsuite/ld-mips-elf/unaligned-jalx-1.d: Update error
message.
* testsuite/ld-mips-elf/unaligned-jalx-mips16-1.d: Likewise.
* testsuite/ld-mips-elf/unaligned-jalx-micromips-1.d: Likewise.
* testsuite/ld-mips-elf/unaligned-jalx-2.d: Remove test.
* testsuite/ld-mips-elf/unaligned-jalx-mips16-2.d: Remove test.
* testsuite/ld-mips-elf/unaligned-jalx-micromips-2.d: Remove
test.
* testsuite/ld-mips-elf/unaligned-jalx-2.s: Remove test source.
* testsuite/ld-mips-elf/unaligned-lwpc-0.d: Fold
`unaligned-lwpc-3' here.
* testsuite/ld-mips-elf/unaligned-lwpc-0.s: Update accordingly.
* testsuite/ld-mips-elf/unaligned-lwpc-1.d: Fold
`unaligned-lwpc-2' here.
* testsuite/ld-mips-elf/unaligned-lwpc-1.s: Update accordingly.
* testsuite/ld-mips-elf/unaligned-lwpc-2.d: Remove test.
* testsuite/ld-mips-elf/unaligned-lwpc-2.s: Remove test source.
* testsuite/ld-mips-elf/unaligned-lwpc-3.d: Remove test.
* testsuite/ld-mips-elf/unaligned-lwpc-3.s: Remove test source.
* testsuite/ld-mips-elf/unaligned-ldpc-0.d: Fold
`unaligned-ldpc-4' here.
* testsuite/ld-mips-elf/unaligned-ldpc-0.s: Update accordingly.
* testsuite/ld-mips-elf/unaligned-ldpc-1.d: Update error
message. Fold `unaligned-ldpc-2' and `unaligned-ldpc-3' here.
* testsuite/ld-mips-elf/unaligned-ldpc-1.s: Update accordingly.
* testsuite/ld-mips-elf/unaligned-ldpc-2.d: Remove test.
* testsuite/ld-mips-elf/unaligned-ldpc-2.s: Remove test source.
* testsuite/ld-mips-elf/unaligned-ldpc-3.d: Remove test.
* testsuite/ld-mips-elf/unaligned-ldpc-3.s: Remove test source.
* testsuite/ld-mips-elf/unaligned-ldpc-4.d: Remove test.
* testsuite/ld-mips-elf/unaligned-ldpc-4.s: Remove test source.
* testsuite/ld-mips-elf/mips-elf.exp: Delete removed tests.
A `bfd_reloc_outofrange' condition from `mips_elf_calculate_relocation'
currently triggers the warning callback, which in the case of LD prints
messages like:
foo.o: In function `foo':
(.text+0x0): warning: JALX to a non-word-aligned address
or:
foo.o: In function `foo':
(.text+0x0): warning: PC-relative load from unaligned address
and nothing else, which suggests this is a benign condition and link has
otherwise successfully run to completion. This is however not the case,
the link terminates right away with no further messages and no output
produced.
Use the general error or warning info callback then, preserving the
message format. Also set a BFD error condition so that a failure is
unambiguously reported. Complement the change with a set of suitable
test suite additions.
bfd/
* elfxx-mips.c (_bfd_mips_elf_relocate_section)
<bfd_reloc_outofrange>: Call `->einfo' rather than `->warning'.
Call `bfd_set_error'.
ld/
* testsuite/ld-mips-elf/unaligned-jalx-0.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-1.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-2.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-mips16-0.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-mips16-1.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-mips16-2.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-micromips-0.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-micromips-1.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-micromips-2.d: New test.
* testsuite/ld-mips-elf/unaligned-lwpc-0.d: New test.
* testsuite/ld-mips-elf/unaligned-lwpc-1.d: New test.
* testsuite/ld-mips-elf/unaligned-lwpc-2.d: New test.
* testsuite/ld-mips-elf/unaligned-lwpc-3.d: New test.
* testsuite/ld-mips-elf/unaligned-ldpc-0.d: New test.
* testsuite/ld-mips-elf/unaligned-ldpc-1.d: New test.
* testsuite/ld-mips-elf/unaligned-ldpc-2.d: New test.
* testsuite/ld-mips-elf/unaligned-ldpc-3.d: New test.
* testsuite/ld-mips-elf/unaligned-ldpc-4.d: New test.
* testsuite/ld-mips-elf/unaligned-jalx-0.s: New test source.
* testsuite/ld-mips-elf/unaligned-jalx-1.s: New test source.
* testsuite/ld-mips-elf/unaligned-jalx-2.s: New test source.
* testsuite/ld-mips-elf/unaligned-insn.s: New test source.
* testsuite/ld-mips-elf/unaligned-lwpc-0.s: New test source.
* testsuite/ld-mips-elf/unaligned-lwpc-1.s: New test source.
* testsuite/ld-mips-elf/unaligned-lwpc-2.s: New test source.
* testsuite/ld-mips-elf/unaligned-lwpc-3.s: New test source.
* testsuite/ld-mips-elf/unaligned-ldpc-0.s: New test source.
* testsuite/ld-mips-elf/unaligned-ldpc-1.s: New test source.
* testsuite/ld-mips-elf/unaligned-ldpc-2.s: New test source.
* testsuite/ld-mips-elf/unaligned-ldpc-3.s: New test source.
* testsuite/ld-mips-elf/unaligned-ldpc-4.s: New test source.
* testsuite/ld-mips-elf/unaligned-syms.s: New test source.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
During archive rescan to resolve symbol references for files added by
LTO, linker add_archive_element callback is called to check if an
archive element should added. After all IR symbols have been claimed,
linker won't claim new IR symbols and shouldn't add the LTO archive
element. This patch updates linker add_archive_element callback to
return FALSE when seeing an LTO archive element during rescan and
changes ELF linker to skip such archive element.
bfd/
PR ld/20103
* cofflink.c (coff_link_check_archive_element): Return TRUE if
linker add_archive_element callback returns FALSE.
* ecoff.c (ecoff_link_check_archive_element): Likewise.
* elf64-ia64-vms.c (elf64_vms_link_add_archive_symbols): Skip
archive element if linker add_archive_element callback returns
FALSE.
* elflink.c (elf_link_add_archive_symbols): Likewise.
* pdp11.c (aout_link_check_ar_symbols): Likewise.
* vms-alpha.c (alpha_vms_link_add_archive_symbols): Likewise.
* xcofflink.c (xcoff_link_check_dynamic_ar_symbols): Likewise.
(xcoff_link_check_ar_symbols): Likewise.
ld/
PR ld/20103
* ldmain.c (add_archive_element): Don't claim new IR symbols
after all IR symbols have been claimed.
* plugin.c (plugin_call_claim_file): Remove no_more_claiming
check.
* testsuite/ld-plugin/lto.exp (pr20103): New proc.
Run PR ld/20103 tests.
* testsuite/ld-plugin/pr20103a.c: New file.
* testsuite/ld-plugin/pr20103b.c: Likewise.
* testsuite/ld-plugin/pr20103c.c: Likewise.
Do not convert jump relocs against local MIPS16 or microMIPS symbols to
refer to a section symbol instead even on RELA targets, as it makes it
impossible for the linker to make a JAL to JALX conversion based on ISA
symbol annotation, breaking regular and compressed MIPS interlinking.
gas/
* config/tc-mips.c (mips_fix_adjustable): Also return 0 for
jump relocations against MIPS16 or microMIPS symbols on RELA
targets.
* testsuite/gas/mips/jalx-local.d: New test.
* testsuite/gas/mips/jalx-local-n32.d: New test.
* testsuite/gas/mips/jalx-local-n64.d: New test.
* testsuite/gas/mips/jalx-local.s: New test source.
* testsuite/gas/mips/mips.exp: Run the new tests.
ld/
* testsuite/ld-mips-elf/jalx-local.d: New test.
* testsuite/ld-mips-elf/jalx-local-n32.d: New test.
* testsuite/ld-mips-elf/jalx-local-n64.d: New test.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
2016-05-23 Thomas Preud'homme <thomas.preudhomme@arm.com>
bfd/
* bfd-in.h (bfd_elf32_arm_keep_private_stub_output_sections): Declare
bfd hook.
* bfd-in2.h: Regenerate.
* elf32-arm.c (arm_dedicated_stub_output_section_required): New
function.
(arm_dedicated_stub_output_section_required_alignment): Likewise.
(arm_dedicated_stub_output_section_name): Likewise.
(arm_dedicated_stub_input_section_ptr): Likewise.
(elf32_arm_create_or_find_stub_sec): Add stub type parameter and
function description comment. Add support for dedicated output stub
section to given stub types.
(elf32_arm_add_stub): Add a stub type parameter and pass it down to
elf32_arm_create_or_find_stub_sec.
(elf32_arm_create_stub): Pass stub type down to elf32_arm_add_stub.
(elf32_arm_size_stubs): Pass stub type when calling
elf32_arm_create_or_find_stub_sec for Cortex-A8 erratum veneers.
(bfd_elf32_arm_keep_private_stub_output_sections): New function.
ld/
* emultempl/armelf.em (arm_elf_before_allocation): Call
bfd_elf32_arm_keep_private_stub_output_sections before generic
before_allocation function.
The microMIPS JALX instruction shares the R_MICROMIPS_26_S1 relocation
with microMIPS J/JAL/JALS instructions, however unlike the latters its
encoded immediate argument is unusually shifted left by 2 rather than 1
in calculating the value used for the operation requested.
We already handle this exception in `mips_elf_calculate_relocation' in
LD, in a scenario where JALX is produced as a result of relaxing JAL for
the purpose of making a cross-mode jump. We also get it right in the
disassembler in `decode_micromips_operand'.
What we don't correctly do however is processing microMIPS JALX produced
by GAS from an assembly source, where a non-zero constant argument or a
symbol reference with a non-zero in-place addend has been used. In this
case the same calculation is made as for microMIPS J/JAL/JALS, causing
the wrong encoding to be produced by GAS on making an object file, and
then again by LD in the final link. The latter in particular causes the
calculation, where the addend fits in the relocatable field, to produce
different final addresses for the same source code depending on whether
REL or RELA relocations are used.
Correct these issues by special-casing microMIPS JALX in the places that
have been previously missed.
bfd/
* elfxx-mips.c (mips_elf_read_rel_addend): Adjust the addend for
microMIPS JALX.
gas/
* config/tc-mips.c (append_insn): Correct the encoding of a
constant argument for microMIPS JALX.
(tc_gen_reloc): Correct the encoding of an in-place addend for
microMIPS JALX.
* testsuite/gas/mips/jalx-addend.d: New test.
* testsuite/gas/mips/jalx-addend-n32.d: New test.
* testsuite/gas/mips/jalx-addend-n64.d: New test.
* testsuite/gas/mips/jalx-imm.d: New test.
* testsuite/gas/mips/jalx-imm-n32.d: New test.
* testsuite/gas/mips/jalx-imm-n64.d: New test.
* testsuite/gas/mips/jalx-addend.s: New test source.
* testsuite/gas/mips/jalx-imm.s: New test source.
* testsuite/gas/mips/mips.exp: Run the new tests.
ld/
* testsuite/ld-mips-elf/jalx-addend.d: New test.
* testsuite/ld-mips-elf/jalx-addend-n32.d: New test.
* testsuite/ld-mips-elf/jalx-addend-n64.d: New test.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
Don't convert R_386_GOT32 since we can't tell if it is applied
to "mov $foo@GOT, %reg" which isn't a load via GOT.
bfd/
PR ld/20117
* elf32-i386.c (elf_i386_convert_load_reloc): Don't check
R_386_GOT32X.
(elf_i386_convert_load): Don't convert R_386_GOT32.
ld/
PR ld/20117
* testsuite/ld-i386/i386.exp: Run pr20117.
* testsuite/ld-i386/pr19609-1i.d: Updated.
* testsuite/ld-i386/pr20117.d: New file.
* testsuite/ld-i386/pr20117.s: Likewise.
2016-05-19 Cupertino Miranda <cmiranda@synopsys.com>
* emulparams/arcelf.sh: Changed.
* emulparams/arclinux.sh: Likewise.
* scripttempl/arclinux.sc: Moved to a more standard implementation
similar to elf.sc.
The `am34-*-linux*' target cannot be configured for, `am34' is not a CPU
name recognized by `config.sub'. It has never been, required code has
not been contributed to GNU config, neither before nor since the
addition of the target triplet to our configury with commit bfff164249
("Add MN10300 linker relaxation support for symbol differences") back in
2007. Also there is no difference in actual tool configuration between
the `am34-*-linux*' and `am33_2.0-*-linux*' targets, except from a
different executable prefix and tooldir name.
Given the above remove the target triplet from our configuration.
bfd/
* config.bfd: Remove `am34-*-linux*' support.
ld/
* configure.tgt: Remove `am34-*-linux*' support.
A different set of hacks to make the crossref tests pass on powerpc64
and powerpc64le.
* testsuite/ld-scripts/crossref.exp: Remove -mcall-aixdesc hack.
* testsuite/ld-scripts/cross2.t: Tweak .opd and .toc placement.
* testsuite/ld-scripts/cross3.t: Likewise.
* testsuite/ld-scripts/cross4.t: Likewise.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.
Tweaks to make it easier to re-run these testcases by hand.
* testsuite/ld-elf/shared.exp (mix_pic_and_non_pic): Pass in
exe name rather than constructing testname. Fix typo in
sub-test name. Log copying. Use -rpath rather than -R.
* scripttempl/ft32.sc: Use fixed constants for memory region
lengths. Include DWARF debug sections.
(.data .bss): Do not assign locations during relocatable links.
* testsuite/ld-elf/compressed1d.d: Skip for FT32.
* testsuite/ld-elf/sec-to-seg.exp: Likewise.
* testsuite/ld-elf/sec64k.exp: Likewise.
* testsuite/ld-elf/init-fini-array.d: XFail for FT32.
* testsuite/ld-elf/merge.d: Likewise.
* testsuite/ld-elf/orphan-region.d: Likewise.
* testsuite/ld-elf/orphan.s: Likewise.
* testsuite/ld-elf/orphan3.d: Likewise.
* testsuite/ld-elf/pr349.d: Likewise.
* testsuite/ld-elf/warn2.d: Likewise.
* testsuite/lib/ld-lib.exp (check_shared_lib_support): Note
that the FT32 does not support shared libraries.
The plugin is called to claim symbols in an archive element from
plugin_object_p. But those symbols aren't needed to create output.
They are defined and referenced only within IR. get_symbols should
return resolution based on IR symbol kinds.
PR ld/20070
* Makefile.am (noinst_LTLIBRARIES): Add libldtestplug4.la.
(libldtestplug4_la_SOURCES): New.
(libldtestplug4_la_CFLAGS): Likewise.
(libldtestplug4_la_LDFLAGS): Likewise.
* Makefile.in: Regenerated.
* plugin.c (get_symbols): Return resolution based on IR symbol
kinds for symbols defined/referenced only within IR.
* testplug4.c: New file.
* ld/testsuite/ld-plugin/pr20070.d: Likewise.
* ld/testsuite/ld-plugin/pr20070a.c: Likewise.
* ld/testsuite/ld-plugin/pr20070b.c: Likewise.
* testsuite/ld-plugin/plugin.exp (plugin4_name): New.
(plugin4_path): Likewise.
Add a test for ld/20070.
2016-05-10 Thomas Preud'homme <thomas.preudhomme@arm.com>
bfd/
* elf32-arm.c (elf32_arm_size_stubs): Use new macros
ARM_GET_SYM_BRANCH_TYPE and ARM_SET_SYM_BRANCH_TYPE to respectively get
and set branch type of a symbol.
(bfd_elf32_arm_process_before_allocation): Likewise.
(elf32_arm_relocate_section): Likewise and fix identation along the
way.
(allocate_dynrelocs_for_symbol): Likewise.
(elf32_arm_finish_dynamic_symbol): Likewise.
(elf32_arm_swap_symbol_in): Likewise.
(elf32_arm_swap_symbol_out): Likewise.
gas/
* config/tc-arm.c (arm_adjust_symtab): Use ARM_SET_SYM_BRANCH_TYPE to
set branch type of a symbol.
gdb/
* arm-tdep.c (arm_elf_make_msymbol_special): Use
ARM_GET_SYM_BRANCH_TYPE to get branch type of a symbol.
include/
* arm.h (enum arm_st_branch_type): Add new ST_BRANCH_ENUM_SIZE
enumerator.
(NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS): New macro.
(ENUM_ARM_ST_BRANCH_TYPE_BITMASK): Likewise.
(ARM_SYM_BRANCH_TYPE): Replace by ...
(ARM_GET_SYM_BRANCH_TYPE): This and ...
(ARM_SET_SYM_BRANCH_TYPE): This in two versions depending on whether
BFD_ASSERT is defined or not.
ld/
* emultempl/armelf.em (gld${EMULATION_NAME}_finish): Use
ARM_GET_SYM_BRANCH_TYPE to get branch type of a symbol.
opcodes/
* arm-dis.c (get_sym_code_type): Use ARM_GET_SYM_BRANCH_TYPE to get
branch type of a symbol.
(print_insn): Likewise.
2016-05-10 Thomas Preud'homme <thomas.preudhomme@arm.com>
bfd/
* bfd-in.h (elf32_arm_size_stubs): Add an output section parameter.
* bfd-in2.h: Regenerated.
* elf32-arm.c (struct elf32_arm_link_hash_table): Add an output section
parameter to add_stub_section callback.
(elf32_arm_create_or_find_stub_sec): Get output section from link_sec
and pass it down to add_stub_section.
(elf32_arm_add_stub): Set section to stub_sec if NULL before using it
for error message.
(elf32_arm_size_stubs): Add output section parameter to
add_stub_section function pointer parameter.
ld/
* emultempl/armelf.em (elf32_arm_add_stub_section): Add output_section
parameter and rename input_section parameter to after_input_section.
Append input stub section to the output section if after_input_section
is NULL.
We don't want this to match .rela.text or similar.
* testsuite/ld-scripts/pr14962-2.t: Match .text, not *.text.
* testsuite/ld-scripts/rgn-at5.t: Similarly, .sec not *.sec.
* testsuite/ld-scripts/section-match-1.t: Likewise.
When a global symbol is defined in COMDAT group, we shouldn't leave an
undefined symbol in symbol table when the symbol section is discarded
unless there is a reference to the symbol outside of COMDAT group.
bfd/
PR ld/17550
* elf-bfd.h (elf_link_hash_entry): Update comments for indx,
documenting that indx == -3 if symbol is defined in a discarded
section.
* elflink.c (elf_link_add_object_symbols): Set indx to -3 if
symbol is defined in a discarded section.
(elf_link_output_extsym): Strip a global symbol defined in a
discarded section.
ld/
PR ld/17550
* testsuite/ld-elf/pr17550-1.s: New file.
* testsuite/ld-elf/pr17550-2.s: Likewise.
* testsuite/ld-elf/pr17550-3.s: Likewise.
* testsuite/ld-elf/pr17550-4.s: Likewise.
* testsuite/ld-elf/pr17550a.d: Likewise.
* testsuite/ld-elf/pr17550b.d: Likewise.
* testsuite/ld-elf/pr17550c.d: Likewise.
* testsuite/ld-elf/pr17550d.d: Likewise.
Some targets are only really, or at least regularly, regression-tested
in a crossed configuration. Currently we only have native compiled test
cases for the STB_GNU_UNIQUE feature in the linker test suite. This is
nice, covering run-time semantics even, but quite often not run at all.
Consequently a regression may remain unnoticed for long.
Add a simple test case then to provide basic linker coverage with no
need for a compiler or a native toolchain.
ld/
* testsuite/ld-unique/unique.d: New test.
* testsuite/ld-unique/unique.exp: Run the new test. Adjust
messages for compiled tests.
binutils* testsuite/lib/binutils-common.exp (is_elf_format): Add avr-*-*.
ld * testsuite/ld-elf/pr18735.d: Allow other symbols.
* testsuite/ld-elf/sec64k.exp: Skip 64ksec for avr.
* testsuite/ld-gc/pr14265.d: Allow other symbols.
* testsuite/ld-plugin/plugin.exp: Add PR ld/17973 to
plugin_tests only if check_shared_lib_support is true.
* testsuite/ld-selective/selective.exp: Add --section-start
flag for avr.
When handling absolute relocations for global symbols bind within the
shared object, AArch64 will generate one dynamic RELATIVE relocation,
but won't apply the value for this absolution relocations at static
linking stage. This is different from AArch64 gold linker and x86-64.
This is not a bug as AArch64 is RELA, there is only guarantee that
relocation addend is placed in the relocation entry. But some
system softwares originally writen for x86-64 might assume AArch64
bfd linker gets the same behavior as x86-64, then they could take
advantage of this buy skipping those RELATIVE dynamic relocations
if the load address is the same as the static linking address.
This patch makes AArch64 BFD linker applies absolution relocations at
static linking stage for scenario described above. Meanwhile old AArch64
android loader has a bug (PR19163) which relies on current linker behavior
as a workaround, so the same option --no-apply-dynamic-relocs added.
There is no need to download source if we aren't on remote host.
Otherwise, each ld test run on local host leaves behind a couple
test files.
* config/default.exp (NOPIE_CFLAGS): Download source only on
remote host.
(NOPIE_LDFLAGS): Likewise.
* testsuite/lib/ld-lib.exp (check_lto_available): Likewise.
(check_lto_fat_available): Likewise.
(check_lto_shared_available): Likewise.
(check_ifunc_available): Likewise.
(check_ifunc_attribute_available): Likewise.
Since not all ELF targets use the elf.em emulation to support ld option:
--compress-debug-sections=zlib-gnu, limit compressed1b.d to Linux/GNU
targets.
* testsuite/ld-elf/compressed1b.d: Only run for Linux/GNU targets.
Skip debug sections when estimating distances between output sections
since compressed_size is used to compress debug sections and debug
sections aren't excluded from distances between output sections.
bfd/
PR ld/20006
* elf64-x86-64.c (elf_x86_64_convert_load): Skip debug sections
when estimating distances between output sections.
ld/
PR ld/20006
* testsuite/ld-elfvsb/elfvsb.exp (COMPRESS_LDFLAG): New.
(visibility_run): Pass COMPRESS_LDFLAG to visibility_test on
ELF targets.
Since ld may generate compressed debug sections by default, pass
--compress-debug-sections=none to ld to avoid compressed debug
sections.
* ld-elf/compressed1b.d: Pass --compress-debug-sections=none
to ld.
* ld-elf/compressed1c.d: Likewise.
Check for LTO availability will hide LTO bugs in ld. Since GCC 4.9 adds
-ffat-lto-objects, we always run LTO tests on Linux with GCC 4.9 or newer.
* testsuite/lib/ld-lib.exp (check_lto_available): Return 1 on
Linux with GCC 4.9 or newer.
(check_lto_fat_available): Likewise.
(check_lto_shared_available): Likewise.
Fixes failures on hppa-linux and alpha-linux due to not merging
.data.* and .sdata into .data. cross3.t modified too since it is the
template for the NOCROSSREFS_TO scripts.
* testsuite/ld-scripts/cross3.t: Add commonly used data
and text section names to output section statements.
* testsuite/ld-scripts/cross4.t: Likewise.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.
Move ELF relocation check after lang_gc_sections so that all the
reference counting code for plt and got relocs can be removed. This
only affects ELF targets which check relocations after opening all
input file.
* ldlang.c (lang_check_relocs): New function.
(lang_process): Call lang_check_relocs after lang_gc_sections.
* emultempl/elf32.em (gld${EMULATION_NAME}_before_parse): Don't
call _bfd_elf_link_check_relocs here.
There is no need for run-time relocation when converting pointers
in .eh_frame section to DW_EH_PE_pcrel encoding. R_386_NONE and
R_X86_64_NONE are expected since the space for run-time relocation
has been allocated. This is an optimization.
PR ld/19972
* testsuite/ld-elf/eh6.d: Pass -rW to readelf and check for
R_386_NONE or R_X86_64_NONE.
Since elf_x86_64_check_relocs is called after opening all input files,
we can detect dynamic R_X86_64_32 relocation overflow there.
bfd/
PR ld/19969
* elf64-x86-64.c (check_relocs_failed): New.
(elf_x86_64_need_pic): Moved before elf_x86_64_check_relocs.
Support relocation agaist local symbol. Set check_relocs_failed.
(elf_x86_64_check_relocs): Use elf_x86_64_need_pic. Check
R_X86_64_32 relocation overflow.
(elf_x86_64_relocate_section): Skip if check_relocs failed.
Update one elf_x86_64_need_pic and remove one elf_x86_64_need_pic.
ld/
PR ld/19969
* testsuite/ld-x86-64/pr19969.d: New file.
* testsuite/ld-x86-64/pr19969a.S: Likewise.
* testsuite/ld-x86-64/pr19969b.S: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run pr19969 tests.
Delaying checking ELF relocations until opening all input files so
that symbol information is final when relocations are checked. This
is only enabled for x86 targets.
bfd/
* elf-bfd.h (_bfd_elf_link_check_relocs): New.
* elflink.c (_bfd_elf_link_check_relocs): New function.
(elf_link_add_object_symbols): Call _bfd_elf_link_check_relocs
if check_relocs_after_open_input is FALSE.
include/
* bfdlink.h (bfd_link_info): Add check_relocs_after_open_input.
ld/
* emulparams/elf32_x86_64.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
New.
* emulparams/elf_i386.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
Likewise.
* emulparams/elf_i386_be.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
Likewise.
* emulparams/elf_i386_chaos.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
Likewise.
* emulparams/elf_i386_ldso.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
Likewise.
* emulparams/elf_i386_vxworks.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
Likewise.
* emulparams/elf_x86_64.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
Likewise.
* emulparams/i386nto.sh (CHECK_RELOCS_AFTER_OPEN_INPUT):
Likewise.
* emultempl/elf32.em (gld${EMULATION_NAME}_before_parse):
Set check_relocs_after_open_input to TRUE if
CHECK_RELOCS_AFTER_OPEN_INPUT is yes.
(gld${EMULATION_NAME}_after_open): Call
_bfd_elf_link_check_relocs on all inputs if
check_relocs_after_open_input is TRUE.
This test checks run-time relocation overflow with GOT relocation and
32-bit relocation against the same symbol.
PR ld/19719
* testsuite/ld-x86-64/pr19719.d: New file.
* testsuite/ld-x86-64/pr19719.s: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run pr19719.
NOCROSSREFS_TO is similar to the existing NOCROSSREFS command but only
checks one direction of cross referencing.
ld/ChangeLog
* ld.texinfo: Document NOCROSSREFS_TO script command.
* ldlang.h (struct lang_nocrossrefs): Add onlyfirst field.
(lang_add_nocrossref_to): New prototype.
* ldcref.c (check_local_sym_xref): Use onlyfirst to only look for
symbols defined in the first section.
(check_nocrossref): Likewise.
* ldgram.y (NOCROSSREFS_TO): New script command.
* ldlang.c (lang_add_nocrossref): Set onlyfirst to FALSE.
(lang_add_nocrossref_to): New function.
* ldlex.l (NOCROSSREFS_TO): New token.
* NEWS: Mention NOCROSSREFS_TO.
* testsuite/ld-scripts/cross4.t: New file.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.
* testsuite/ld-scripts/crossref.exp: Run 4 new NOCROSSREFS_TO
tests.
Add support for arc/nps400 cmem instructions, these load and store
instructions are hard-wired to access "0x57f00000 + 16-bit-offset".
Supporting this relocation required some additions to the arc relocation
handling in the bfd library, as well as the standard changes required to
add a new relocation type.
There's a test of the new instructions in the assembler, and a test of
the relocation in the linker.
bfd/ChangeLog:
* reloc.c: Add BFD_RELOC_ARC_NPS_CMEM16 entry.
* bfd-in2.h: Regenerate.
* libbfd.h: Regenerate.
* elf32-arc.c: Add 'opcode/arc.h' include.
(struct arc_relocation_data): Add symbol_name.
(arc_special_overflow_checks): New function.
(arc_do_relocation): Use arc_special_overflow_checks, reindent as
required, add an extra comment.
(elf_arc_relocate_section): Setup symbol_name in reloc_data.
gas/ChangeLog:
* testsuite/gas/arc/nps400-3.d: New file.
* testsuite/gas/arc/nps400-3.s: New file.
include/ChangeLog:
* elf/arc-reloc.def: Add ARC_NPS_CMEM16 reloc.
* opcode/arc.h (NPS_CMEM_HIGH_VALUE): Define.
ld/ChangeLog:
* testsuite/ld-arc/arc.exp: New file.
* testsuite/ld-arc/nps-1.s: New file.
* testsuite/ld-arc/nps-1a.d: New file.
* testsuite/ld-arc/nps-1b.d: New file.
* testsuite/ld-arc/nps-1b.err: New file.
opcodes/ChangeLog:
* arc-nps400-tbl.h: Add xldb, xldw, xld, xstb, xstw, and xst
instructions.
* arc-opc.c (insert_nps_cmem_uimm16): New function.
(extract_nps_cmem_uimm16): New function.
(arc_operands): Add NPS_XLDST_UIMM16 operand.
In some cases a variable could be left uninitialised and then an attempt
made to read this variable, resulting in a tcl error. This commit
initialises the variable in all cases.
ld/ChangeLog:
* testsuite/lib/ld-lib.exp (run_dump_test): Initialise
check_ld(terminal).
Since compiler may pass --as-needed to ld by default, link .o file
before .so file in x86-64 tests.
PR ld/19774
* testsuite/ld-x86-64/x86-64.exp: Link tmpdir/pr17689b.o before
tmpdir/pr17689.so, fix gotpcrel1 test and add more --as-needed
tests.
We shouldn't issue an error for read-only segment with dynamic IFUNC
relocations when dynamic relocations are against normal symbols.
bfd/
PR ld/19939
* elf-bfd.h (_bfd_elf_allocate_ifunc_dyn_relocs): Add a pointer
to bfd_boolean.
* elf-ifunc.c (_bfd_elf_allocate_ifunc_dyn_relocs): Updated.
Set *readonly_dynrelocs_against_ifunc_p to TRUE if dynamic reloc
applies to read-only section.
* elf32-i386.c (elf_i386_link_hash_table): Add
readonly_dynrelocs_against_ifunc.
(elf_i386_allocate_dynrelocs): Updated.
(elf_i386_size_dynamic_sections): Issue an error for read-only
segment with dynamic IFUNC relocations only if
readonly_dynrelocs_against_ifunc is TRUE.
* elf64-x86-64.c (elf_x86_64_link_hash_table): Add
readonly_dynrelocs_against_ifunc.
(elf_x86_64_allocate_dynrelocs): Updated.
(elf_x86_64_size_dynamic_sections): Issue an error for read-only
segment with dynamic IFUNC relocations only if
readonly_dynrelocs_against_ifunc is TRUE.
* elfnn-aarch64.c (elfNN_aarch64_allocate_ifunc_dynrelocs):
Updated.
ld/
PR ld/19939
* testsuite/ld-i386/i386.exp: Run PR ld/19939 tests.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-i386/pr19939.s: New file.
* testsuite/ld-i386/pr19939a.d: Likewise.
* testsuite/ld-i386/pr19939b.d: Likewise.
* testsuite/ld-x86-64/pr19939.s: Likewise.
* testsuite/ld-x86-64/pr19939a.d: Likewise.
* testsuite/ld-x86-64/pr19939b.d: Likewise.
* ldlang.c (print_output_section_statement): Show minfo size
in target machine address units.
(print_reloc_statement): Likewise.
(print_padding_statement): Likewise.
(print_data_statement): Likewise. Ensure minimum print_dot
increment of one address unit.
When building with --enable-targets=all the target string is not set to
something that matches the pattern arc*-*, and so the script used to
decide if we should build big or little endian linker script currently
exits with an error.
This commit makes little endian linker script be the default, which will
be used when building for all targets, this matches the behaviour from
before I made the endianness switchable, when we only ever built little
endian linker scripts anyway.
ld/ChangeLog:
* emulparams/arc-endianness.sh: Make little endian default choice.
This aims to bring the linker for big-endian arc targets into line with
the linker for (the default) little endian arc targets.
The bulk of the changes are to extend the target pattern in the test
files from 'arc-*...' to 'arc*-*...' and so match both big and little
endian arc targets.
In the ld/emulparams/ directory the existing scripts checked for a
variable ARC_ENDIAN to switch between big and little endian targets,
however, this variable is never set up.
So, a new script snippet is introduced which sets up ARC_ENDIAN based on
the value of target, this snippet is then included from all of the
existing arc scripts.
The existing big-endian variants of all the scripts, which existed, but
were never used, are deleted in this commit.
ld/ChangeLog:
* emulparams/arc-endianness.sh: New file.
* emulparams/arcebelf.sh: Deleted.
* emulparams/arcebelf_prof.sh: Deleted.
* emulparams/arceblinux.sh: Deleted.
* emulparams/arceblinux_prof.sh: Deleted.
* emulparams/arcelf.sh: Include arc-endinness.sh.
* emulparams/arcelf_prof.sh: Include arc-endinness.sh.
* emulparams/arclinux.sh: Include arc-endinness.sh.
* emulparams/arclinux_prof.sh: Include arc-endinness.sh.
* emulparams/arcv2elf.sh: Include arc-endinness.sh.
* emulparams/arcv2elfx.sh: Include arc-endinness.sh.
* testsuite/ld-elf/compressed1d.d: Update pattern for big and
little endian arc targets.
* testsuite/ld-elf/eh-frame-hdr.d: Likewise.
* testsuite/ld-elf/group1.d: Likewise.
* testsuite/ld-elf/group3b.d: Likewise.
* testsuite/ld-elf/group8a.d: Likewise.
* testsuite/ld-elf/group8b.d: Likewise.
* testsuite/ld-elf/group9a.d: Likewise.
* testsuite/ld-elf/group9b.d: Likewise.
* testsuite/ld-elf/linkonce2.d: Likewise.
* testsuite/ld-elf/pr12851.d: Likewise.
* testsuite/ld-elf/pr12975.d: Likewise.
* testsuite/ld-elf/pr13177.d: Likewise.
* testsuite/ld-elf/pr13195.d: Likewise.
* testsuite/ld-elf/pr17615.d: Likewise.
* testsuite/ld-elf/pr19162.d: Likewise.
* testsuite/ld-elf/sec64k.exp: Likewise.
* testsuite/lib/ld-lib.exp: 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.
