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834 Commits

Author SHA1 Message Date
John Baldwin
b4992e9990 Support AT_FXRNG and AT_KPRELOAD on FreeBSD. 
FreeBSD's kernel has recently added two new ELF auxiliary vector
entries.  AT_FXRNG points to a root seed version for the kernel's
PRNG.  Userland can use this to reseed a userland PRNG after the
kernel's PRNG has reseeded.  AT_KPRELOAD is the base address of a
kernel-provided vDSO.

This change displays the proper name and description of these entries
in 'info auxv'.

include/ChangeLog:

	* elf/common.h (AT_FREEBSD_FXRNG, AT_FREEBSD_KPRELOAD): Define.
 2021-12-07 10:29:01 -08:00
Luca Boccassi
e5382207cd readelf: recognize FDO Packaging Metadata ELF note 
As defined on: https://systemd.io/COREDUMP_PACKAGE_METADATA/
this note will be used starting from Fedora 36. Allow
readelf --notes to pretty print it:

Displaying notes found in: .note.package
  Owner                Data size 	Description
  FDO                  0x00000039	FDO_PACKAGING_METADATA
    Packaging Metadata: {"type":"deb","name":"fsverity-utils","version":"1.3-1"}

Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
 2021-12-01 14:44:25 +00:00
Nelson Chu
8155b8539b RISC-V: Support STO_RISCV_VARIANT_CC and DT_RISCV_VARIANT_CC. 
This is the original discussion,
https://github.com/riscv/riscv-elf-psabi-doc/pull/190

And here is the glibc part,
https://sourceware.org/pipermail/libc-alpha/2021-August/129931.html

For binutils part, we need to support a new direcitve: .variant_cc.
The function symbol marked by .variant_cc means it need to be resolved
directly without resolver for dynamic linker.  We also add a new dynamic
entry, STO_RISCV_VARIANT_CC, to indicate there are symbols with the
special attribute in the dynamic symbol table of the object.

I heard that llvm already have supported this in their mainline, so
I think it's time to commit this.

bfd/
	* elfnn-riscv.c (riscv_elf_link_hash_table): Added variant_cc
	flag. It is used to check if relocations for variant CC symbols
	may be present.
	(allocate_dynrelocs): If the symbol has STO_RISCV_VARIANT_CC
	flag, then raise the variant_cc flag of riscv_elf_link_hash_table.
	(riscv_elf_size_dynamic_sections): Added dynamic entry for
	variant_cc.
	(riscv_elf_merge_symbol_attribute): New function, used to merge
	non-visibility st_other attributes, including STO_RISCV_VARIANT_CC.
binutils/
	* readelf.c (get_riscv_dynamic_type): New function.
	(get_dynamic_type): Called get_riscv_dynamic_type for riscv targets.
	(get_riscv_symbol_other): New function.
	(get_symbol_other): Called get_riscv_symbol_other for riscv targets.
gas/
	* config/tc-riscv.c (s_variant_cc): Marked symbol that it follows a
	variant CC convention.
	(riscv_elf_copy_symbol_attributes): Same as elf_copy_symbol_attributes,
	but without copying st_other.  If a function symbol has special st_other
	value set via directives, then attaching an IFUNC resolver to that symbol
	should not override the st_other setting.
	(riscv_pseudo_table): Support variant_cc diretive.
	* config/tc-riscv.h (OBJ_COPY_SYMBOL_ATTRIBUTES): Defined.
	* testsuite/gas/riscv/variant_cc-set.d: New testcase.
	* testsuite/gas/riscv/variant_cc-set.s: Likewise.
	* testsuite/gas/riscv/variant_cc.d: Likewise.
	* testsuite/gas/riscv/variant_cc.s: Likewise.
include/
	* elf/riscv.h (DT_RISCV_VARIANT_CC): Defined to (DT_LOPROC + 1).
	(STO_RISCV_VARIANT_CC): Defined to 0x80.
ld/
	* testsuite/ld-riscv-elf/variant_cc-1.s: New testcase.
	* testsuite/ld-riscv-elf/variant_cc-2.s: Likewise.
	* testsuite/ld-riscv-elf/variant_cc-now.d: Likewise.
	* testsuite/ld-riscv-elf/variant_cc-r.d: Likewise.
	* testsuite/ld-riscv-elf/variant_cc-shared.d: Likewise.
	* testsuite/ld-riscv-elf/ld-riscv-elf.exp: Updated.
 2021-11-19 09:32:19 +08:00
Fangrui Song
a7fd118627 readelf: Support SHT_RELR/DT_RELR for -r 
The -r output for SHT_RELR looks like:

Relocation section '.relr.dyn' at offset 0x530 contains 4 entries:
  7 offsets
00000000000028c0
00000000000028c8
0000000000003ad0
0000000000003ad8
0000000000003ae0
0000000000003ae8
0000000000003af0

For --use-dynamic, the header looks like

    'RELR' relocation section at offset 0x530 contains 32 bytes:

include/
    * elf/common.h (DT_ENCODING): Bump to 38.
    * elf/external.h (Elf32_External_Relr): New.
    (Elf64_External_Relr): New.
binutils/
    * readelf.c (enum relocation_type): New.
    (slurp_relr_relocs): New.
    (dump_relocations): Change is_rela to rel_type.
    Dump RELR.
    (dynamic_relocations): Add DT_RELR.
    (process_relocs): Check SHT_RELR and DT_RELR.
    (process_dynamic_section): Store into dynamic_info for
    DT_RELR/DT_RELRENT/DT_RELRSZ.
 2021-11-16 13:04:33 -08:00
Alan Modra
7aba54da42 PowerPC64 @notoc in non-power10 code 
R_PPC64_REL24_P9NOTOC is a variant of R_PPC64_REL24_NOTOC for use on
@notoc cals from non-power10 code in the rare case that using such a
construct is useful.  R_PPC64_REL24_P9NOTOC will be emitted by gas
rather than R_PPC64_REL24_NOTOC when @notoc is used in a branch
instruction if power10 instructions are not enabled at that point.
The new relocation tells the linker to not use power10 instructions on
any stub emitted for that branch, unless overridden by
--power10-stubs=yes.

The current linker heuristic of only generating power10 instructions
for stubs if power10-only relocations are detected, continues to be
used.

include/
	* elf/ppc64.h (R_PPC64_REL24_P9NOTOC): Define.
bfd/
	* reloc.c (BFD_RELOC_PPC64_REL24_P9NOTOC): Define.
	* elf64-ppc.c (ppc64_elf_howto_raw): Add entry for new reloc.
	(ppc64_elf_reloc_type_lookup): Handle it.
	(enum ppc_stub_type): Delete.
	(enum ppc_stub_main_type, ppc_stub_sub_type): New.
	(struct ppc_stub_type): New.
	(struct ppc_stub_hash_entry): Use the above new type.
	(struct ppc_link_hash_table): Update stub_count.
	(is_branch_reloc, ppc64_elf_check_relocs),
	(toc_adjusting_stub_needed): Handle new reloc.
	(stub_hash_newfunc, select_alt_stub, ppc_merge_stub),
	(ppc_type_of_stub, plt_stub_size, build_plt_stub),
	(build_tls_get_addr_head, build_tls_get_addr_tail),
	(ppc_build_one_stub, ppc_size_one_stub, ppc64_elf_size_stubs),
	(ppc64_elf_build_stubs, ppc64_elf_relocate_section): Handle new
	reloc.  Modify stub handling to suit new scheme.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Regenerate.
gas/
	* config/tc-ppc.c (ppc_elf_suffix): When power10 is not enabled
	return BFD_RELOC_PPC64_REL24_P9NOTOC for @notoc.
	(fixup_size, ppc_force_relocation, ppc_fix_adjustable): Handle
	BFD_RELOC_PPC64_REL24_P9NOTOC.
ld/
	* testsuite/ld-powerpc/callstub-2.s: Add .machine power10.
 2021-11-15 12:20:13 +10:30
Fangrui Song
dd207c1302 readelf: Support RELR in -S and -d and output 
readelf -r dumping support is not added in this patch.

include/
	* elf/common.h: Add SHT_RELR, DT_RELR{,SZ,ENT}
bfd/
	* elf.c (_bfd_elf_print_private_bfd_data): Add DT_RELR{,SZ,ENT}.
binutils/
	* readelf.c (get_dynamic_type): Add DT_RELR{,SZ,ENT}.
	(get_section_type_name): Add SHT_RELR.
 2021-11-06 17:11:08 +10:30
Przemyslaw Wirkus
3197e593d8 arm: add armv9-a architecture to -march 
Update also include:
	+ New value of Tag_CPU_arch EABI attribute (22) is added.
	+ Updated missing Tag_CPU_arch EABI attributes.
	+ Updated how we combine archs 'v4t_plus_v6_m' as this mechanism
	  have to handle new Armv9 as well.

Regression tested on `arm-none-eabi` cross Binutils and no issues.

bfd/

	* archures.c: Define bfd_mach_arm_9.
	* bfd-in2.h (bfd_mach_arm_9): Define bfd_mach_arm_9.
	* cpu-arm.c: Add 'armv9-a' option to -march.
	* elf32-arm.c (using_thumb2_bl): Update assert check.
	(arch_has_arm_nop): Add TAG_CPU_ARCH_V9.
	(bfd_arm_get_mach_from_attributes): Add case for TAG_CPU_ARCH_V9.
	Update assert.
	(tag_cpu_arch_combine): Updated table.
	(v9): New table..

binutils/

	* readelf.c (arm_attr_tag_CPU_arch): Update with

elfcpp/

	* arm.h: Update TAG_CPU_ARCH_ enums with correct values.

gas/

	* NEWS: Update docs.
	* config/tc-arm.c (get_aeabi_cpu_arch_from_fset): Return Armv9-a
	for -amarch=all.
	(aeabi_set_public_attributes): Update assert.
	* doc/c-arm.texi: Update docs.
	* testsuite/gas/arm/armv9-a_arch.d: New test.
	* testsuite/gas/arm/attr-march-all.d: Update test with v9.

include/

	* elf/arm.h Update TAG_CPU_ARCH_ defines with correct values.
	* opcode/arm.h (ARM_EXT3_V9A): New macro.
	(ARM_ARCH_NONE): Updated with arm_feature_set.core size.
	(FPU_NONE): Updated.
	(ARM_ANY): Updated.
	(ARM_ARCH_UNKNOWN): New macro.
	(ARM_FEATURE_LOW): Updated.
	(ARM_FEATURE_CORE): Updated.
	(ARM_FEATURE_CORE_LOW): Updated.
	(ARM_FEATURE_CORE_HIGH): Updated.
	(ARM_FEATURE_COPROC): Updated.
	(ARM_FEATURE): Updated.
	(ARM_FEATURE_ALL): New macro.

opcodes/

	* arm-dis.c (select_arm_features): Support bfd_mach_arm_9.
	Also Update bfd_mach_arm_unknown to use new macro ARM_ARCH_UNKNOWN.
 2021-11-01 10:51:03 +00:00
liuzhensong
e214f8db56 LoongArch bfd support 
2021-10-22  Chenghua Xu  <xuchenghua@loongson.cn>
	    Zhensong Liu  <liuzhensong@loongson.cn>
	    Weinan Liu  <liuweinan@loongson.cn>
bfd/
	* Makefile.am: Add LoongArch.
	* archures.c: Likewise.
	* config.bfd: Likewise.
	* configure.ac: Likewise.
	* cpu-loongarch.c: New.
	* elf-bfd.h: Add LoongArch.
	* elf.c: Add LoongArch elfcore_grok_xxx.
	* elfnn-loongarch.c: New.
	* elfxx-loongarch.c: New.
	* elfxx-loongarch.h: New.
	* reloc.c: Add LoongArch BFD RELOC ENUM.
	* targets.c: Add LoongArch target.
	* Makefile.in: Regenerate.
	* bfd-in2.h: Regenerate.
	* configure: Regenerate.
	* libbfd.h: Regenerate.
	* po/BLD-POTFILES.in: Regenerate.
	* po/SRC-POTFILES.in: Regenerate.

include/
	* elf/common.h: Add NT_LARCH_{CPUCFG,CSR,LSX,LASX}.
	* elf/loongarch.h: New.
 2021-10-24 21:36:31 +10:30
Libor Bukata
6420dd27cb Add Solaris specific ELF note processing 
Add elfcore_grok_solaris_note function that enables to
obtain process status, register values, and program info
from Solaris's core files.

bfd/
	* elf.c (elfcore_grok_solaris_note): Solaris specific ELF
	note parser. Better GDB's coredump analysis on Solaris...
	(elfcore_grok_solaris_note_impl): New function.
	(elfcore_grok_solaris_prstatus): New function.
	(elfcore_grok_solaris_info): New function.
	(elfcore_grok_solaris_lwpstatus): New function.
	(elf_parse_notes): Added "CORE" groker element.
include/
	* elf/common.h: Add note segment constants for core files on
	Solaris systems.
 2021-09-30 16:28:14 +09:30
Luis Machado
64dbf74d42 Revert: [AArch64] MTE corefile support 
bfd     * elf.c (elfcore_make_memtag_note_section): New function.
                (elfcore_grok_note): Handle NT_MEMTAG note types.

        binutils* readelf.c (get_note_type): Handle NT_MEMTAG note types.

        include * elf/common.h (NT_MEMTAG): New constant.
                (NT_MEMTAG_TYPE_AARCH_MTE): New constant.
 2021-09-07 11:03:20 -03:00
Andrea Corallo
c9fed6655f PATCH [4/4] arm: Add Tag_PACRET_use build attribute 
bfd/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf32-arm.c (elf32_arm_merge_eabi_attributes): Add
	'Tag_PACRET_use' case.

binutils/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* readelf.c (arm_attr_tag_PAC_extension): Declare.
	(arm_attr_public_tags): Add 'PAC_extension' lookup.

elfcpp/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* arm.h: Define 'Tag_PACRET_use' enum.

gas/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* config/tc-arm.c (arm_convert_symbolic_attribute): Add
	'Tag_PACRET_use' to the attribute_table.

include/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf/arm.h (elf_arm_reloc_type): Add 'Tag_PACRET_use'.
 2021-08-17 14:49:42 +02:00
Andrea Corallo
b81ee92f03 PATCH [3/4] arm: Add Tag_BTI_use build attribute 
bfd/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf32-arm.c (elf32_arm_merge_eabi_attributes): Add
	'Tag_BTI_use' case.

binutils/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* readelf.c (arm_attr_tag_PAC_extension): Declare.
	(arm_attr_public_tags): Add 'PAC_extension' lookup.

elfcpp/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* arm.h: Define 'Tag_BTI_use' enum.

gas/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* config/tc-arm.c (arm_convert_symbolic_attribute): Add
	'Tag_BTI_use' to the attribute_table.

include/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf/arm.h (elf_arm_reloc_type): Add 'Tag_BTI_use'.
 2021-08-17 14:49:42 +02:00
Andrea Corallo
4b53503018 PATCH [2/4] arm: Add Tag_BTI_extension build attribute 
bfd/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf32-arm.c (elf32_arm_merge_eabi_attributes): Add
	'Tag_BTI_extension' case.

binutils/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* readelf.c (arm_attr_tag_PAC_extension): Declare.
	(arm_attr_public_tags): Add 'PAC_extension' lookup.

elfcpp/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* arm.h: Define 'Tag_BTI_extension' enum.

gas/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* config/tc-arm.c (arm_convert_symbolic_attribute): Add
	'Tag_BTI_extension' to the attribute_table.

include/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf/arm.h (elf_arm_reloc_type): Add 'Tag_BTI_extension'.
 2021-08-17 14:49:42 +02:00
Andrea Corallo
99db83d07d PATCH [1/4] arm: Add Tag_PAC_extension build attribute 
bfd/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf32-arm.c (elf32_arm_merge_eabi_attributes): Add
	'Tag_PAC_extension' case.

binutils/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* readelf.c (arm_attr_tag_PAC_extension): Declare.
	(arm_attr_public_tags): Add 'PAC_extension' lookup.

elfcpp/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* arm.h: Define 'Tag_PAC_extension' enum.

gas/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* config/tc-arm.c (arm_convert_symbolic_attribute): Add
	'Tag_PAC_extension' to the attribute_table.

include/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf/arm.h (elf_arm_reloc_type): Add 'Tag_PAC_extension'.
 2021-08-17 14:49:42 +02:00
Luis Machado
3af2785c97 Add 3 new PAC-related ARM note types 
The following patch synchronizes includes/objdump/readelf with the Linux
Kernel in terms of ARM regset notes.

We're currently missing 3 of them:

NT_ARM_PACA_KEYS
NT_ARM_PACG_KEYS
NT_ARM_PAC_ENABLED_KEYS

We don't need GDB to bother with this at the moment, so this doesn't update
bfd/elf.c. If needed, we can do it in the future.

binutils/

	* readelf.c (get_note_type): Handle new ARM PAC notes.

include/elf/

	* common.h (NT_ARM_PACA_KEYS, NT_ARM_PACG_KEYS)
	(NT_ARM_PAC_ENABLED_KEYS): New constants.
 2021-08-11 09:42:44 -03:00
H.J. Lu
6320fd00dc elf: Add GNU_PROPERTY_1_NEEDED 
Add GNU_PROPERTY_1_NEEDED:

 #define GNU_PROPERTY_1_NEEDED      GNU_PROPERTY_UINT32_OR_LO

to indicate the needed properties by the object file.

Add GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS:

 #define GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS  (1U << 0)

to indicate that the object file requires canonical function pointers and
cannot be used with copy relocation.

binutils/

	* readelf.c (decode_1_needed): New.
	(print_gnu_property_note): Handle GNU_PROPERTY_1_NEEDED.

include/

	* elf/common.h (GNU_PROPERTY_1_NEEDED): New.
	(GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS): Likewise.

ld/

	* testsuite/ld-elf/property-1_needed-1a.d: New file.
	* testsuite/ld-elf/property-1_needed-1.s: Likewise.
 2021-07-08 18:11:53 -07:00
Kito Cheng
fbc95f1e11 RISC-V: Add PT_RISCV_ATTRIBUTES and add it to PHDR. 
We added PT_RISCV_ATTRIBUTES to program header to make
.riscv.attribute easier to find in dynamic loader or kernel.

Ref:
https://github.com/riscv/riscv-elf-psabi-doc/pull/71

ChangeLog:

bfd/

	* elfnn-riscv.c(RISCV_ATTRIBUTES_SECTION_NAME): New.
	(riscv_elf_additional_program_headers): Ditto.
	(riscv_elf_modify_segment_map): Ditto.
	(elf_backend_additional_program_headers): Ditto.
	(elf_backend_modify_segment_map): Ditto.
	(elf_backend_obj_attrs_section): Use RISCV_ATTRIBUTES_SECTION_NAME
	rather than string literal.

binutils/

	* readelf.c(get_riscv_segment_type): New.
	(get_segment_type): Handle EM_RISCV.

include/

	* elf/riscv.h (PT_RISCV_ATTRIBUTES): New.
	* testsuite/ld-elf/orphan-region.ld: Discard .riscv.attributes
	section for simplify testcase.
	* testsuite/ld-riscv-elf/attr-phdr.d: New.
	* testsuite/ld-riscv-elf/attr-phdr.s: Ditto.
	* testsuite/ld-riscv-elf/ld-riscv-elf.exp: Add attr-phdr to
	testcase.
 2021-07-06 11:34:36 +08:00
H.J. Lu
5a767724d7 elf: Add GNU_PROPERTY_UINT32_AND_XXX/GNU_PROPERTY_UINT32_OR_XXX 
Implement GNU_PROPERTY_UINT32_AND_XXX/GNU_PROPERTY_UINT32_OR_XXX:

https://sourceware.org/pipermail/gnu-gabi/2021q1/000467.html

1. GNU_PROPERTY_UINT32_AND_LO..GNU_PROPERTY_UINT32_AND_HI

 #define GNU_PROPERTY_UINT32_AND_LO 0xb0000000
 #define GNU_PROPERTY_UINT32_AND_HI 0xb0007fff

A bit in the output pr_data field is set only if it is set in all
relocatable input pr_data fields.  If all bits in the the output
pr_data field are zero, this property should be removed from output.

If the bit is 1, all input relocatables have the feature.  If the
bit is 0 or the property is missing, the info is unknown.

2. GNU_PROPERTY_UINT32_OR_LO..GNU_PROPERTY_UINT32_OR_HI

 #define GNU_PROPERTY_UINT32_OR_LO 0xb0008000
 #define GNU_PROPERTY_UINT32_OR_HI 0xb000ffff

A bit in the output pr_data field is set if it is set in any
relocatable input pr_data fields. If all bits in the the output
pr_data field are zero, this property should be removed from output.

If the bit is 1, some input relocatables have the feature.  If the
bit is 0 or the property is missing, the info is unknown.

bfd/

	* elf-properties.c (_bfd_elf_parse_gnu_properties): Handle
	GNU_PROPERTY_UINT32_AND_LO, GNU_PROPERTY_UINT32_AND_HI,
	GNU_PROPERTY_UINT32_OR_LO and GNU_PROPERTY_UINT32_OR_HI.
	(elf_merge_gnu_properties): Likewise.

binutils/

	* readelf.c (print_gnu_property_note): Handle
	GNU_PROPERTY_UINT32_AND_LO, GNU_PROPERTY_UINT32_AND_HI,
	GNU_PROPERTY_UINT32_OR_LO and GNU_PROPERTY_UINT32_OR_HI.

include/

	* elf/common.h (GNU_PROPERTY_UINT32_AND_LO): New.
	(GNU_PROPERTY_UINT32_AND_HI): Likewise.
	(GNU_PROPERTY_UINT32_OR_LO): Likewise.
	(GNU_PROPERTY_UINT32_OR_HI): Likewise.

ld/

	* testsuite/ld-elf/property-and-1.d: New file.
	* testsuite/ld-elf/property-and-1.s: Likewise.
	* testsuite/ld-elf/property-and-2.d: Likewise.
	* testsuite/ld-elf/property-and-2.s: Likewise.
	* testsuite/ld-elf/property-and-3.d: Likewise.
	* testsuite/ld-elf/property-and-3.s: Likewise.
	* testsuite/ld-elf/property-and-4.d: Likewise.
	* testsuite/ld-elf/property-and-empty.s: Likewise.
	* testsuite/ld-elf/property-or-1.d: Likewise.
	* testsuite/ld-elf/property-or-1.s: Likewise.
	* testsuite/ld-elf/property-or-2.d: Likewise.
	* testsuite/ld-elf/property-or-2.s: Likewise.
	* testsuite/ld-elf/property-or-3.d: Likewise.
	* testsuite/ld-elf/property-or-3.s: Likewise.
	* testsuite/ld-elf/property-or-4.d: Likewise.
	* testsuite/ld-elf/property-or-empty.s: Likewise.
 2021-06-18 07:19:01 -07:00
Nick Clifton
c8795e1f2f Allow readelf to recognise GO buildid notes. 
binutils * readelf.c (get_note_type): Add support for NT_GO_BUILDID.

include	 * elf/common.h (NT_GO_BUILDID): Define.
 2021-06-15 11:43:43 +01:00
H.J. Lu
1273b2f8ac x86: Restore PC16 relocation overflow check 
The x86-64 psABI has

---
A program or object file using R_X86_64_8, R_X86_64_16, R_X86_64_PC16
or R_X86_64_PC8 relocations is not conformant to this ABI, these
relocations are only added for documentation purposes.
---

Since x86 PC16 relocations have been used for 16-bit programs in an ELF32
or ELF64 container, PC16 relocation should wrap-around in 16-bit address
space.  Revert

commit a7664973b2
Author: Jan Beulich <jbeulich@suse.com>
Date:   Mon Apr 26 10:41:35 2021 +0200

    x86: correct overflow checking for 16-bit PC-relative relocs

and xfail the related tests.  Also revert

commit 50c95a739c
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed May 26 12:13:13 2021 -0700

    x86: Propery check PC16 reloc overflow in 16-bit mode instructions

while keeping PR ld/27905 tests for PC16 relocation in 16-bit programs.

bfd/

	PR ld/27905
	* elf32-i386.c: Don't include "libiberty.h".
	(elf_howto_table): Revert commits a7664973b2 and 50c95a739c.
	(elf_i386_rtype_to_howto): Revert commit 50c95a739c.
	(elf_i386_info_to_howto_rel): Likewise.
	(elf_i386_tls_transition): Likewise.
	(elf_i386_relocate_section): Likewise.
	* elf64-x86-64.c (x86_64_elf_howto_table): Revert commits
	a7664973b2 and 50c95a739c.
	(elf_x86_64_rtype_to_howto): Revert commit 50c95a739c.
	* elfxx-x86.c (_bfd_x86_elf_parse_gnu_properties): Likewise.
	* elfxx-x86.h (elf_x86_obj_tdata): Likewise.
	(elf_x86_has_code16): Likewise.

binutils/

	PR ld/27905
	* readelf.c (decode_x86_feature_2): Revert commit 50c95a739c.

gas/

	PR ld/27905
	* config/tc-i386.c (set_code_flag): Revert commit 50c95a739c.
	(set_16bit_gcc_code_flag): Likewise.
	(x86_cleanup): Likewise.
	* testsuite/gas/i386/code16-2.d: Updated.
	* testsuite/gas/i386/x86-64-code16-2.d: Likewise.

include/

	PR ld/27905
	* elf/common.h (GNU_PROPERTY_X86_FEATURE_2_CODE16): Removed.

ld/

	PR ld/27905
	* testsuite/ld-i386/pcrel16-2.d: xfail.
	* testsuite/ld-x86-64/pcrel16-2.d: Likewise.
 2021-05-28 09:34:28 -07:00
H.J. Lu
50c95a739c x86: Propery check PC16 reloc overflow in 16-bit mode instructions 
commit a7664973b2
Author: Jan Beulich <jbeulich@suse.com>
Date:   Mon Apr 26 10:41:35 2021 +0200

    x86: correct overflow checking for 16-bit PC-relative relocs

caused linker failure when building 16-bit program in a 32-bit ELF
container.  Update GNU_PROPERTY_X86_FEATURE_2_USED with

 #define GNU_PROPERTY_X86_FEATURE_2_CODE16 (1U << 12)

to indicate that 16-bit mode instructions are used in the input object:

https://groups.google.com/g/x86-64-abi/c/UvvXWeHIGMA

to indicate that 16-bit mode instructions are used in the object to
allow linker to properly perform relocation overflow check for 16-bit
PC-relative relocations in 16-bit mode instructions.

1. Update x86 assembler to always generate the GNU property note with
GNU_PROPERTY_X86_FEATURE_2_CODE16 for .code16 in ELF object.
2. Update i386 and x86-64 linkers to use 16-bit PC16 relocations if
input object is marked with GNU_PROPERTY_X86_FEATURE_2_CODE16.

bfd/

	PR ld/27905
	* elf32-i386.c: Include "libiberty.h".
	(elf_howto_table): Add 16-bit R_386_PC16 entry.
	(elf_i386_rtype_to_howto): Add a BFD argument.  Use 16-bit
	R_386_PC16 if input has 16-bit mode instructions.
	(elf_i386_info_to_howto_rel): Update elf_i386_rtype_to_howto
	call.
	(elf_i386_tls_transition): Likewise.
	(elf_i386_relocate_section): Likewise.
	* elf64-x86-64.c (x86_64_elf_howto_table): Add 16-bit
	R_X86_64_PC16 entry.
	(elf_x86_64_rtype_to_howto): Use 16-bit R_X86_64_PC16 if input
	has 16-bit mode instructions.
	* elfxx-x86.c (_bfd_x86_elf_parse_gnu_properties): Set
	elf_x86_has_code16 if relocatable input is marked with
	GNU_PROPERTY_X86_FEATURE_2_CODE16.
	* elfxx-x86.h (elf_x86_obj_tdata): Add has_code16.
	(elf_x86_has_code16): New.

binutils/

	PR ld/27905
	* readelf.c (decode_x86_feature_2): Support
	GNU_PROPERTY_X86_FEATURE_2_CODE16.

gas/

	PR ld/27905
	* config/tc-i386.c (set_code_flag): Update x86_feature_2_used
	with GNU_PROPERTY_X86_FEATURE_2_CODE16 for .code16 in ELF
	object.
	(set_16bit_gcc_code_flag): Likewise.
	(x86_cleanup): Always generate the GNU property note if
	x86_feature_2_used isn't 0.
	* testsuite/gas/i386/code16-2.d: New file.
	* testsuite/gas/i386/code16-2.s: Likewise.
	* testsuite/gas/i386/x86-64-code16-2.d: Likewise.
	* testsuite/gas/i386/i386.exp: Run code16-2 and x86-64-code16-2.

include/

	PR ld/27905
	* elf/common.h (GNU_PROPERTY_X86_FEATURE_2_CODE16): New.

ld/

	PR ld/27905
	* testsuite/ld-i386/code16.d: New file.
	* testsuite/ld-i386/code16.t: Likewise.
	* testsuite/ld-x86-64/code16.d: Likewise.
	* testsuite/ld-x86-64/code16.t: Likewise.
	* testsuite/ld-i386/i386.exp: Run code16.
	* testsuite/ld-x86-64/x86-64.exp: Likewise.
 2021-05-26 12:13:24 -07:00
Chenghua Xu
01a8c731aa elf: Use official name LoongArch for EM_LOONGARCH. 
The official name for Loongson Architecture is LoongArch, it is better
to use LoongArch instead of Loongson Loongarch for EM_LOONGARCH to avoid
confusion and keep consistent with the various of software in the future.

The official documentation in Chinese:
http://www.loongson.cn/uploadfile/cpu/LoongArch.pdf

The translated version in English:
https://loongson.github.io/LoongArch-Documentation/

    binutils/
        * readelf.c (get_machine_name): Change Loongson Loongarch to
	LoongArch.

    include/
        * elf/common.h (EM_LOONGARCH): Change Loongson Loongarch to
	LoongArch.
 2021-05-23 10:35:48 +08:00
Luis Machado
894982bfcc [AArch64] MTE corefile support 
bfd	* elf.c (elfcore_make_memtag_note_section): New function.
	(elfcore_grok_note): Handle NT_MEMTAG note types.

binutils* readelf.c (get_note_type): Handle NT_MEMTAG note types.

include	* elf/common.h (NT_MEMTAG): New constant.
	(NT_MEMTAG_TYPE_AARCH_MTE): New constant.
 2021-05-21 10:40:32 +01:00
Stafford Horne
0b3e14c902 or1k: Implement relocation R_OR1K_GOT_AHI16 for gotha() 
The gotha() relocation mnemonic will be outputted by OpenRISC GCC when
using the -mcmodel=large option.  This relocation is used along with
got() to generate 32-bit GOT offsets.  This increases the previous GOT
offset limit from the previous 16-bit (64K) limit.

This is needed on large binaries where the GOT grows larger than 64k.

bfd/ChangeLog:

	PR 21464
	* bfd-in2.h: Add BFD_RELOC_OR1K_GOT_AHI16 relocation.
	* elf32-or1k.c (or1k_elf_howto_table, or1k_reloc_map): Likewise.
	(or1k_final_link_relocate, or1k_elf_relocate_section,
	or1k_elf_check_relocs): Likewise.
	* libbfd.h (bfd_reloc_code_real_names): Likewise.
	* reloc.c: Likewise.

cpu/ChangeLog:

	PR 21464
	* or1k.opc (or1k_imm16_relocs, parse_reloc): Define parse logic
	for gotha() relocation.

include/ChangeLog:

	PR 21464
	* elf/or1k.h (elf_or1k_reloc_type): Define R_OR1K_GOT_AHI16 number.

opcodes/ChangeLog:

	PR 21464
	* or1k-asm.c: Regenerate.

gas/ChangeLog:

	PR 21464
	* testsuite/gas/or1k/reloc-1.s: Add test for new relocation.
	* testsuite/gas/or1k/reloc-1.d: Add test result for new
	relocation.

Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>

fixup reloc, add tests
 2021-05-06 20:51:24 +09:00
Alan Modra
9193bc4285 Use bool in include 
* bfdlink.h: Replace bfd_boolean with bool throughout.
	* coff/ecoff.h: Likewise.
	* coff/xcoff.h: Likewise.
	* dis-asm.h: Likewise.
	* elf/mmix.h: Likewise.
	* elf/xtensa.h: Likewise.
	* opcode/aarch64.h: Likewise, and FALSE with false, TRUE with true.
	* opcode/arc.h: Likewise.
	* opcode/mips.h: Likewise.
	* opcode/tic6x-opcode-table.h: Likewise.
	* opcode/tic6x.h: Likewise.
 2021-03-31 10:49:23 +10:30
Alan Modra
3dfb1b6d34 Remove bfd_stdint.h 
If we require C99 for binutils then stdint.h is available.

bfd/
	* .gitignore: Delete bfd_stdint.h entry.
	* Makefile.am (bfdinclude_HEADERS): Delete bfd_stdint.h.
	(BUILD_HFILES, LOCAL_H_DEPS): Likewise.
	* bfd-in.h: Include stdint.h in place of bfd_stdint.h.
	* configure.ac: Don't invoke GCC_HEADER_STDINT.
	* configure.com: Don't create bfd_stdint.h.
	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* bfd-in2.h: Regenerate.
	* config.in: Regenerate.
	* configure: Regenerate.
	* doc/Makefile.in: Regenerate.
	* po/BLD-POTFILES.in: Regenerate.
binutils/
	* coffdump.c: Include stdint.h in place of bfd_stdint.h.
	* dwarf.c: Likewise.
gas/
	* config/tc-aarch64.c: Include stdint.h in place of bfd_stdint.h.
	* config/tc-crx.c: Likewise.
	* config/tc-nds32.h: Likewise.
include/
	* cgen/basic-modes.h: Include stdint.h in place of bfd_stdint.h.
	* elf/nfp.h: Likewise.
	* opcode/aarch64.h: Likewise.
	* opcode/cgen.h: Likewise.
	* opcode/nfp.h: Likewise.
	* opcode/ppc.h: Likewise.
ld/
	* elf-hints-local.h: Include stdint.h in place of bfd_stdint.h.
	* emultempl/nds32elf.em: Likewise.
	* testsuite/ld-elf/mbind2b.c: Likewise.
	* testsuite/ld-elf/pr18718.c: Likewise.
	* testsuite/ld-elf/pr18720a.c: Likewise.
	* testsuite/ld-elf/pr25749-1.c: Likewise.
	* testsuite/ld-elf/pr25749-1a.c: Likewise.
	* testsuite/ld-elf/pr25749-1b.c: Likewise.
	* testsuite/ld-elf/pr25749-1c.c: Likewise.
	* testsuite/ld-elf/pr25749-1d.c: Likewise.
	* testsuite/ld-elf/pr25749-2.c: Likewise.
	* testsuite/ld-elf/pr25754-1a.c: Likewise.
	* testsuite/ld-elf/pr25754-2a.c: Likewise.
	* testsuite/ld-elf/pr25754-3a.c: Likewise.
	* testsuite/ld-elf/pr25754-4a.c: Likewise.
	* testsuite/ld-elf/pr25754-5a.c: Likewise.
	* testsuite/ld-elf/pr25754-6a.c: Likewise.
opcodes/
	* aarch64-dis.c: Include stdint.h in place of bfd_stdint.h.
	* aarch64-dis.h: Likewise.
	* aarch64-opc.c: Likewise.
	* avr-dis.c: Likewise.
	* csky-dis.c: Likewise.
	* nds32-asm.c: Likewise.
	* nds32-dis.c: Likewise.
	* nfp-dis.c: Likewise.
	* riscv-dis.c: Likewise.
	* s12z-dis.c: Likewise.
	* wasm32-dis.c: Likewise.
 2021-03-31 10:49:23 +10:30
Luis Machado
5e984dbf35 AArch64: Add MTE register set support for GDB and gdbserver 
AArch64 MTE support in the Linux kernel exposes a new register
through ptrace.  This patch adds the required code to support it.

include/ChangeLog:

2021-03-24  Luis Machado  <luis.machado@linaro.org>

	* elf/common.h (NT_ARM_TAGGED_ADDR_CTRL): Define.

gdb/ChangeLog:

2021-03-24  Luis Machado  <luis.machado@linaro.org>

	* aarch64-linux-nat.c (fetch_mteregs_from_thread): New function.
	(store_mteregs_to_thread): New function.
	(aarch64_linux_nat_target::fetch_registers): Update to call
	fetch_mteregs_from_thread.
	(aarch64_linux_nat_target::store_registers): Update to call
	store_mteregs_to_thread.
	* aarch64-tdep.c (aarch64_mte_register_names): New struct.
	(aarch64_cannot_store_register): Handle MTE registers.
	(aarch64_gdbarch_init): Initialize and setup MTE registers.
	* aarch64-tdep.h (gdbarch_tdep) <mte_reg_base>: New field.
	<has_mte>: New method.
	* arch/aarch64-linux.h (AARCH64_LINUX_SIZEOF_MTE): Define.

gdbserver/ChangeLog:

2021-03-24  Luis Machado  <luis.machado@linaro.org>

	* linux-aarch64-low.cc (aarch64_fill_mteregset): New function.
	(aarch64_store_mteregset): New function.
	(aarch64_regsets): Add MTE register set entry.
	(aarch64_sve_regsets): Add MTE register set entry.
 2021-03-24 14:52:57 -03:00
H.J. Lu
7b9f985957 elf: Rename EM_INTEL205 to EM_INTELGT 
Rename EM_INTEL205 to EM_INTELGT for Intel Graphics Technology.

binutils/

	* readelf.c (get_machine_name): Add EM_INTELGT.

include/

	* elf/common.h (EM_INTEL205): Renamed to ...
	(EM_INTELGT): This.
 2021-03-19 05:58:46 -07:00
Frederic Cambus
be3b926d8d Add values for NetBSD .note.netbsd.ident notes (PaX). 
* elf/common.h (NT_NETBSD_PAX, NT_NETBSD_PAX_MPROTECT)
 (NT_NETBSD_PAX_NOMPROTECT, NT_NETBSD_PAX_GUARD, NT_NETBSD_PAX_NOGUARD)
 (NT_NETBSD_PAX_ASLR, NT_NETBSD_PAX_NOASLR): Define.
 2021-03-12 14:37:51 +00:00
Andrew Burgess
db6092f3ae bfd/binutils: add support for RISC-V CSRs in core files 
Adds support for including RISC-V control and status registers into
core files.

The value for the define NT_RISCV_CSR is set to 0x900, this
corresponds to a patch I have proposed for the Linux kernel here:

  http://lists.infradead.org/pipermail/linux-riscv/2020-December/003910.html

As I have not yet heard if the above patch will be accepted into the
kernel or not I have set the note name string to "GDB", and the note
type to NT_RISCV_CSR.

This means that if the above patch is rejected from the kernel, and
the note type number 0x900 is assigned to some other note type, we
will still be able to distinguish between the GDB produced
NT_RISCV_CSR, and the kernel produced notes, where the name would be
set to "CORE".

bfd/ChangeLog:

	* elf-bfd.h (elfcore_write_riscv_csr): Declare.
	* elf.c (elfcore_grok_riscv_csr): New function.
	(elfcore_grok_note): Handle NT_RISCV_CSR.
	(elfcore_write_riscv_csr): New function.
	(elfcore_write_register_note): Handle '.reg-riscv-csr'.

binutils/ChangeLog:

	* readelf.c (get_note_type): Handle NT_RISCV_CSR.

include/ChangeLog:

	* elf/common.h (NT_RISCV_CSR): Define.
 2021-03-05 17:21:41 +00:00
Andrew Burgess
b63a5e38ef bfd/binutils: support for gdb target descriptions in the core file 
This commit lays the ground work for allowing GDB to write its target
description into a generated core file.

The goal of this work is to allow a user to connect to a remote
target, capture a core file from within GDB, then pass the executable
and core file to another user and have the user be able to examine the
state of the machine without needing to connect to a running target.

Different remote targets can have different register sets and this
information is communicated from the target to GDB in the target
description.

It is possible for a user to extract the target description from GDB
and pass this along with the core file so that when the core file is
used the target description can be fed back into GDB, however this is
not a great user experience.

It would be nicer, I think, if GDB could write the target description
directly into the core file, and then make use of this description
when loading a core file.

This commit performs the binutils/bfd side of this task, adding the
boiler plate functions to access the target description from within a
core file note, and reserving a new number for a note containing the
target description.  Later commits will extend GDB to make use of
this.

The new note is given the name 'GDB' and a type NT_GDB_TDESC.  This
should hopefully protect us if there's ever a reuse of the number
assigned to NT_GDB_TDESC by some other core file producer.  It should
also, hopefully, make it clearer to users that this note carries GDB
specific information.

bfd/ChangeLog:

	* elf-bfd.h (elfcore_write_gdb_tdesc): Declare new function.
	* elf.c (elfcore_grok_gdb_tdesc): New function.
	(elfcore_grok_note): Handle NT_GDB_TDESC.
	(elfcore_write_gdb_tdesc): New function.
	(elfcore_write_register_note): Handle NT_GDB_TDESC.

binutils/ChangeLog:

	* readelf.c (get_note_type): Handle NT_GDB_TDESC.

include/ChangeLog:

	* elf/common.h (NT_GDB_TDESC): Define.
 2021-03-05 17:21:40 +00:00
Nelson Chu
dcd709e056 RISC-V: Comments tidy and improvement. 
The GNU coding standards said the comments should be complete sentences
and end with a period and two spaces.  But sometimes it should be more
cleaner when the comments only include a word or codes.  Therefore, I made
the following changes after referring to other target/generic codes,

* Try to write sentences in comments, must end with a period and two spaces.
* End with two spaces without a period for codes/instructions only.
* End with one space without a period for a single word/variable only.

Besids, also rewrite/remove some comments which are obsolete or too long,
and fix indents for comments.

bfd/
    * elfnn-riscv.c: Comments tidy and improvement.
    * elfxx-riscv.c: Likewise.
    * elfxx-riscv.h: Likewise.
gas/
    * config/tc-riscv.c: Comments tidy and improvement.  Also update
    comment "fallthru" to "Fall through" that end with a period and
    two spaces.
include/
    * elf/riscv.h: Comments tidy and improvement.
    * opcode/riscv-opc.h: Likewise.
    * opcode/riscv.h: Likewise.
opcodes/
    * riscv-dis.c: Comments tidy and improvement.
    * riscv-opc.c: Likewise.
 2021-01-15 17:28:07 +08:00
Alan Modra
250d07de5c Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
H.J. Lu
279d901e5a x86-64: Add Intel LAM property support 
Add Intel Linear Address Masking (LAM) property support.  LAM modifies
the checking that is applied to 64-bit linear addresses, allowing
software to use of the untranslated address bits for metadata.

bfd/

	* elf-linker-x86.h (elf_x86_cet_report): Renamed to ...
	(elf_x86_prop_report): This.
	(elf_linker_x86_params): Add lam_u48, lam_u57, lam_u48_report
	and lam_u57_report.
	* elfxx-x86.c (_bfd_x86_elf_link_setup_gnu_properties): Support
	GNU_PROPERTY_X86_FEATURE_1_LAM_U48 and
	GNU_PROPERTY_X86_FEATURE_1_LAM_U57.
	(_bfd_x86_elf_link_fixup_gnu_properties): Keep LAM features only
	for 64-bit output.

binutils/

	* NEWS: Mention LAM_U48 and LAM_U57 support.
	* elfedit.c (elf_x86_feature): Support lam_u48 and lam_u57.
	(usage): Add lam_u48 and lam_u57.
	* readelf.c (decode_x86_feature_1): Support LAM_U48 and LAM_U57.
	* doc/binutils.texi: Update elfedit with lam_u48 and lam_u57
	support.
	* testsuite/binutils-all/x86-64/lam-u48.d: New file.
	* testsuite/binutils-all/x86-64/lam-u48.s: Likewise.
	* testsuite/binutils-all/x86-64/lam-u57.d: Likewise.
	* testsuite/binutils-all/x86-64/lam-u57.s: Likewise.

include/

	* elf/common.h (GNU_PROPERTY_X86_FEATURE_1_LAM_U48): New.
	(GNU_PROPERTY_X86_FEATURE_1_LAM_U57): Likewise.

ld/

	* NEWS: Mention LAM_U48 and LAM_U57 support.
	* ld.texi: Document LAM_U48 and LAM_U57 support.
	* emulparams/cet.sh: Updated.
	* emulparams/elf_x86_64.sh: Source x86-64-lam.sh.
	* emulparams/x86-64-lam.sh: New file.
	* testsuite/ld-x86-64/property-x86-lam-u48-1a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u48-1b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u48-2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u48-3a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u48-3b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u48-4.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u48-5.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u48.s: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57-1a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57-1b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57-2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57-3a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57-3b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57-4.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57-5.d: Likewise.
	* testsuite/ld-x86-64/property-x86-lam-u57.s: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Run LAM tests.
 2020-12-23 13:00:55 -08:00
Vivek Das Mohapatra
ee0688c233 Define a new DT_GNU_FLAGS_1 dynamic section for ld, readelf et al 
DT_GNU_FLAGS_1 added to the DT_VALRNGLO-DT_VALRNGHI range.
DT_GNU_FLAGS_1 value DF_GNU_1_UNIQUE added.

	* elf/common.h (DT_GNU_FLAGS_1, DF_GNU_1_UNIQUE): Define.
 2020-12-15 18:44:43 +10:30
Cary Coutant
4cf2ad7200 Update ELF headers and readelf with recent e_machine assignments. 
binutils/
	* readelf.c (get_machine_name): Update list of e_machine values.

include/
	* elf/common.h: Update list of e_machine values.
 2020-12-13 15:22:30 -08:00
Nick Clifton
846141822b Remove references to the unofficial SHF_GNU_BUILD_NOTE section flag. 
binutils	* objcopy.c (is_mergeable_note_section): Remove reference to
	SHF_GNU_BUILD_NOTE.

include	* elf/common.h (SHF_GNU_BUILD_NOTE): Delete.
 2020-12-07 16:17:40 +00:00
Jozef Lawrynowicz
99fabbc973 Support SHF_GNU_RETAIN ELF section flag 
The SHF_GNU_RETAIN section flag is an extension to the GNU ELF OSABI.
It is defined as follows:

=========================================================
Section Attribute Flags
+-------------------------------------+
| Name           | Value              |
+-------------------------------------+
| SHF_GNU_RETAIN | 0x200000 (1 << 21) |
+-------------------------------------+

SHF_GNU_RETAIN
  The link editor should not garbage collect the section.
=========================================================

The .section directive accepts the "R" flag, which indicates
SHF_GNU_RETAIN should be applied to the section.

There is not a direct mapping of SHF_GNU_RETAIN to the BFD
section flag SEC_KEEP. Keeping these flags distinct allows
SHF_GNU_RETAIN sections to be explicitly removed by placing them in
/DISCARD/.

bfd/ChangeLog:

	* elf-bfd.h (enum elf_gnu_osabi): Add elf_gnu_osabi_retain.
	(struct elf_obj_tdata): Increase has_gnu_osabi to 4 bits.
	* elf.c (_bfd_elf_make_section_from_shdr): Set elf_gnu_osabi_retain
	for SHF_GNU_RETAIN.
	(_bfd_elf_final_write_processing): Report if SHF_GNU_RETAIN is
	not supported by the OSABI.
	Adjust error messages.
	* elflink.c (elf_link_input_bfd): Copy enabled has_gnu_osabi bits from
	input BFD to output BFD.
	(bfd_elf_gc_sections): gc_mark the section if SHF_GNU_RETAIN is set.

binutils/ChangeLog:

	* NEWS: Announce SHF_GNU_RETAIN support.
	* readelf.c (get_elf_section_flags): Handle SHF_GNU_RETAIN.
	Recognize SHF_GNU_RETAIN and SHF_GNU_MBIND only for supported OSABIs.
	* testsuite/binutils-all/readelf.exp: Run new tests.
	Don't run run_dump_test when there isn't an assembler available.
	* testsuite/lib/binutils-common.exp (supports_gnu_osabi): Adjust
	comment.
	* testsuite/binutils-all/readelf-maskos-1a.d: New test.
	* testsuite/binutils-all/readelf-maskos-1b.d: New test.
	* testsuite/binutils-all/readelf-maskos.s: New test.
	* testsuite/binutils-all/retain1.s: New test.
	* testsuite/binutils-all/retain1a.d: New test.
	* testsuite/binutils-all/retain1b.d: New test.

gas/ChangeLog:

	* NEWS: Announce SHF_GNU_RETAIN support.
	* config/obj-elf.c (obj_elf_change_section): Merge SHF_GNU_RETAIN bit
	between section declarations.
	(obj_elf_parse_section_letters): Handle 'R' flag.
	Handle numeric flag values within the SHF_MASKOS range.
	(obj_elf_section): Validate SHF_GNU_RETAIN usage.
	* doc/as.texi: Document 'R' flag to .section directive.
	* testsuite/gas/elf/elf.exp: Run new tests.
	* testsuite/gas/elf/section10.d: Unset SHF_GNU_RETAIN bit.
	* testsuite/gas/elf/section10.s: Likewise.
	* testsuite/gas/elf/section22.d: New test.
	* testsuite/gas/elf/section22.s: New test.
	* testsuite/gas/elf/section23.s: New test.
	* testsuite/gas/elf/section23a.d: New test.
	* testsuite/gas/elf/section23b.d: New test.
	* testsuite/gas/elf/section23b.err: New test.
	* testsuite/gas/elf/section24.l: New test.
	* testsuite/gas/elf/section24.s: New test.
	* testsuite/gas/elf/section24a.d: New test.
	* testsuite/gas/elf/section24b.d: New test.

include/ChangeLog:

	* elf/common.h (SHF_GNU_RETAIN): Define.

ld/ChangeLog:

	* NEWS: Announce support for SHF_GNU_RETAIN.
	* ld.texi (garbage collection): Document SHF_GNU_RETAIN.
	(Output Section Discarding): Likewise.
	* testsuite/ld-elf/elf.exp: Run new tests.
	* testsuite/ld-elf/retain1.s: New test.
	* testsuite/ld-elf/retain1a.d: New test.
	* testsuite/ld-elf/retain1b.d: New test.
	* testsuite/ld-elf/retain2.d: New test.
	* testsuite/ld-elf/retain2.ld: New test.
	* testsuite/ld-elf/retain2.map: New test.
	* testsuite/ld-elf/retain3.d: New test.
	* testsuite/ld-elf/retain3.s: New test.
	* testsuite/ld-elf/retain4.d: New test.
	* testsuite/ld-elf/retain4.s: New test.
	* testsuite/ld-elf/retain5.d: New test.
	* testsuite/ld-elf/retain5.map: New test.
	* testsuite/ld-elf/retain5lib.s: New test.
	* testsuite/ld-elf/retain5main.s: New test.
	* testsuite/ld-elf/retain6a.d: New test.
	* testsuite/ld-elf/retain6b.d: New test.
	* testsuite/ld-elf/retain6lib.s: New test.
	* testsuite/ld-elf/retain6main.s: New test.
 2020-11-18 11:51:13 +00:00
H.J. Lu
b0ab069373 x86: Support GNU_PROPERTY_X86_ISA_1_BASELINE marker 
GCC 11 supports -march=x86-64-v[234] to enable x86 micro-architecture ISA
levels:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97250

X86 ISA markers are updated:

https://gitlab.com/x86-psABIs/x86-64-ABI/-/merge_requests/13

GNU_PROPERTY_X86_ISA_1_BASELINE is added and GNU_PROPERTY_X86_ISA_1_V[234]
are updated:

 #define GNU_PROPERTY_X86_ISA_1_BASELINE (1U << 0)
 #define GNU_PROPERTY_X86_ISA_1_V2       (1U << 1)
 #define GNU_PROPERTY_X86_ISA_1_V3       (1U << 2)
 #define GNU_PROPERTY_X86_ISA_1_V4       (1U << 3)

Add -z x86-64-baseline linker command line option to mark x86-64-baseline
ISA level as needed.

bfd/

	PR gas/26703
	* elfxx-x86.c (_bfd_x86_elf_link_setup_gnu_properties): Generate
	GNU_PROPERTY_X86_ISA_1_BASELINE for -z x86-64-baseline.

binutils/

	PR gas/26703
	* readelf.c (decode_x86_isa): Handle
	* GNU_PROPERTY_X86_ISA_1_BASELINE.
	* testsuite/binutils-all/i386/empty.d: Updated.
	* testsuite/binutils-all/i386/ibt.d: Likewise.
	* testsuite/binutils-all/i386/pr21231a.d: Likewise.
	* testsuite/binutils-all/i386/pr21231b.d: Likewise.
	* testsuite/binutils-all/i386/shstk.d: Likewise.
	* testsuite/binutils-all/x86-64/empty-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/empty.d: Likewise.
	* testsuite/binutils-all/x86-64/ibt-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/ibt.d: Likewise.
	* testsuite/binutils-all/x86-64/pr21231a.d: Likewise.
	* testsuite/binutils-all/x86-64/pr21231b.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494a-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494a.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494c-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494c.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494d-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494d.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494e-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494e.d: Likewise.
	* testsuite/binutils-all/x86-64/shstk-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/shstk.d: Likewise.

gas/

	PR gas/26703
	* config/tc-i386.c (output_insn): Update for
	GNU_PROPERTY_X86_ISA_1_BASELINE.
	* testsuite/gas/i386/property-1.d: Updated.
	* testsuite/gas/i386/property-2.d: Likewise.
	* testsuite/gas/i386/property-3.d: Likewise.
	* testsuite/gas/i386/property-4.d: Likewise.
	* testsuite/gas/i386/property-5.d: Likewise.
	* testsuite/gas/i386/property-6.d: Likewise.
	* testsuite/gas/i386/property-11.d: Likewise.
	* testsuite/gas/i386/property-12.d: Likewise.
	* testsuite/gas/i386/x86-64-property-1.d: Likewise.
	* testsuite/gas/i386/x86-64-property-2.d: Likewise.
	* testsuite/gas/i386/x86-64-property-3.d: Likewise.
	* testsuite/gas/i386/x86-64-property-4.d: Likewise.
	* testsuite/gas/i386/x86-64-property-5.d: Likewise.
	* testsuite/gas/i386/x86-64-property-6.d: Likewise.
	* testsuite/gas/i386/x86-64-property-11.d: Likewise.
	* testsuite/gas/i386/x86-64-property-12.d: Likewise.

include/

	PR gas/26703
	* elf/common.h (GNU_PROPERTY_X86_ISA_1_BASELINE): New.
	(GNU_PROPERTY_X86_ISA_1_V2): Uppdated.
	(GNU_PROPERTY_X86_ISA_1_V3): Likewise.
	(GNU_PROPERTY_X86_ISA_1_V4): Likewise.

ld/

	PR gas/26703
	* NEWS: Mention -z x86-64-baseline.
	* ld.texi: Document -z x86-64-baseline.
	* emulparams/x86-64-level.sh: Handle -z x86-64-baseline.
	* testsuite/ld-elf/x86-feature-1a.rd: Update.
	* testsuite/ld-elf/x86-feature-1b.rd: Likewise.
	* testsuite/ld-elf/x86-feature-1c.rd: Likewise.
	* testsuite/ld-elf/x86-feature-1d.rd: Likewise.
	* testsuite/ld-elf/x86-feature-1e.rd: Likewise.
	* testsuite/ld-i386/pr23372c.d: Likewise.
	* testsuite/ld-i386/pr23486c.d: Likewise.
	* testsuite/ld-i386/pr23486d.d: Likewise.
	* testsuite/ld-i386/pr24322a.d: Likewise.
	* testsuite/ld-i386/pr24322b.d: Likewise.
	* testsuite/ld-i386/property-1a.r: Likewise.
	* testsuite/ld-i386/property-2a.r: Likewise.
	* testsuite/ld-i386/property-3.r: Likewise.
	* testsuite/ld-i386/property-3a.r: Likewise.
	* testsuite/ld-i386/property-4.r: Likewise.
	* testsuite/ld-i386/property-4a.r: Likewise.
	* testsuite/ld-i386/property-5.r: Likewise.
	* testsuite/ld-i386/property-5a.r: Likewise.
	* testsuite/ld-i386/property-7a.r: Likewise.
	* testsuite/ld-i386/property-x86-3.d: Likewise.
	* testsuite/ld-i386/property-x86-4a.d: Likewise.
	* testsuite/ld-i386/property-x86-5.d: Likewise.
	* testsuite/ld-i386/property-x86-cet1.d: Likewise.
	* testsuite/ld-i386/property-x86-cet2a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet5a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet5b.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt1a.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt1b.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt2.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt3a.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt3b.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt4.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt5.d: Likewise.
	* testsuite/ld-i386/property-x86-isa1.d: Likewise.
	* testsuite/ld-i386/property-x86-isa2.d: Likewise.
	* testsuite/ld-i386/property-x86-isa3.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk1a.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk1b.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk2.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk3a.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk3b.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk4.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk5.d: Likewise.
	* testsuite/ld-x86-64/pr23372c-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23372c.d: Likewise.
	* testsuite/ld-x86-64/pr23486c-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23486c.d: Likewise.
	* testsuite/ld-x86-64/pr23486d-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23486d.d: Likewise.
	* testsuite/ld-x86-64/pr24322a-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24322a.d: Likewise.
	* testsuite/ld-x86-64/pr24322b-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24322b.d: Likewise.
	* testsuite/ld-x86-64/pr24458a-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24458a.d: Likewise.
	* testsuite/ld-x86-64/pr24458b-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24458b.d: Likewise.
	* testsuite/ld-x86-64/pr24458c-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24458c.d: Likewise.
	* testsuite/ld-x86-64/property-1a.r: Likewise.
	* testsuite/ld-x86-64/property-2a.r: Likewise.
	* testsuite/ld-x86-64/property-3.r: Likewise.
	* testsuite/ld-x86-64/property-3a.r: Likewise.
	* testsuite/ld-x86-64/property-4.r: Likewise.
	* testsuite/ld-x86-64/property-4a.r: Likewise.
	* testsuite/ld-x86-64/property-5.r: Likewise.
	* testsuite/ld-x86-64/property-5a.r: Likewise.
	* testsuite/ld-x86-64/property-7a.r: Likewise.
	* testsuite/ld-x86-64/property-x86-3-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-3.d: Likewise.
	* testsuite/ld-x86-64/property-x86-4a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-4a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-5-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-5.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet1-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet1.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt2-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt4-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt4.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt5-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa1-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa1.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa2-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa3-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa3.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt5.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk2-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk4-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk4.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk5-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk5.d: Likewise.
	* testsuite/ld-i386/i386.exp: Run property-x86-isa4.
	* testsuite/ld-i386/property-x86-isa4.d: New file.
	* testsuite/ld-x86-64/property-x86-isa4-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa4.d: Likewise.
	* ld/testsuite/ld-x86-64/x86-64.exp: Run property-x86-isa4
	and property-x86-isa4-x32.
 2020-10-30 06:50:10 -07:00
Nelson Chu
02dd9d2568 RISC-V: Support GNU indirect functions. 
Generally, glibc dynamic linker should have two ways to deal with ifunc
- one is to handle the IRELATIVE relocations for the non-preemtive ifunc
symbols, the other is to handle the R_RISCV_32/64 and R_RISCV_JUMP_SLOT
relocations with the STT_IFUNC preemtive symbols.  No matter which method
is used, both of them should get the resolved ifunc symbols at runtime.
Therefore, linker needs to generate the correct dynamic relocations for
ifunc to make sure the the dynamic linker works well.  For now, there are
thirteen relocations are supported for ifunc in GNU ld,

* R_RISCV_CALL and R_RISCV_CALL_PLT:
The RISC-V compiler won't generate R_RISCV_JAL directly to jump to an
ifunc.  Besides, we disable the relaxations for the relocation referenced
to ifunc, so just handling the R_RISCV_CALL and R_RISCV_CALL_PLT should be
enough.  Linker should generate a .plt entry and a .got.plt entry for it,
and also needs to insert a dynamic IRELATIVE in the .got.plt enrty, or
insert a R_RISCV_JUMP_SLOT when generating shared library.

* R_RISCV_PCREL_HI20 and R_RISCV_PCREL_LO12_I/S:
LA/LLA pattern with local fPIC ifunc symbol, or any non-PIC ifunc symbol.
The PC-relative relocation.  The current linker will deal with them in
the same way as R_RISCV_CALL_PLT.

* R_RISCV_GOT_HI20 and R_RISCV_PCREL_LO12_I/S:
LA pattern with global PIC ifunc symbol.  Linker should insert a dynamic
IRELATIVE in the .got entry, or insert a R_RISCV_32/64 when generating
shared library.

* R_RISCV_32 and R_RISCV_64:
Store the ifunc symbol into the data section.  Linker should insert a
dynamic IRELATIVE in the data section, or insert a R_RISCV_32/64 when
generating shared library.

* R_RISCV_HI20 and R_RISCV_LO12_I/S:
The LUI + ADDI/LW/SW patterns.  The absolute access relocation.  The
medlow model without the -fPIC compiler option should generate them.
The ld ifunc testsuites "Build pr23169a" and "Build pr23169d" need the
relocations, they are in the ld/testsuite/ld-ifunc/, and need compiler
support.

However, we also made some optimizations with reference to x86,

* If GOT and PLT relocations refer to the same ifunc symbol when generating
pie, then they can actually share a .got entry without creating two entries
to store the same value and relocation.

* If GOT, PLT and DATA relocations refer to the same ifunc symbol when
generating position dependency executable, then linker will fill the address
of .plt entry into the corresponding .got entry and data section, without
insert any dynamic relocations for the GOT and DATA relocations.

For the ifunc testcases, there are three types of them,

1. ifunc-reloc-*: Only check the single type of relocation refers to
ifunc symbol.
* ifunc-reloc-call: R_RISCV_CALL and R_RISCV_CALL_PLT.
* ifunc-reloc-data: R_RISCV_32 and R_RISCV_64.
* ifunc-reloc-got: R_RISCV_GOT_HI20 and R_RISCV_PCREL_LO_I/S.
* ifunc-reloc-pcrel: R_RISCV_PCREL_HI20 and R_RISCV_PCREL_LO_I/S.

2. ifunc-[nonplt|plt]-*: If we don't have PLT relocs, then don't need to
create the PLT and it's .plt entries.
* ifunc-nonplt: Combine R_RISCV_GOT_HI20 and R_RISCV_32/64.
* ifunc-plt: Combine all ifunc relocations.

3. ifunc-seperate-*: If we link the ifunc caller and resolver into the
same module (link the objects), then the results are the same as the
ifunc-reloc-* and ifunc-[noplt|plt]-* testcases.  Consider the cases that
the ifunc callers and resolver are in the different modules, that is, we
compile the ifunc resolver to the shared library first, and then link it
with the ifunc callers.  The output of ifunc callers should be the same as
the normal STT_FUNC cases, and the shared ifunc resolver should define the
symbols as STT_IFUNC.

The R_RISCV_PCREL_HI20 reloc is special.  It should be linked and resolved
locally, so if the ifunc resolver is defined in other modules (other shared
libraries), then the R_RISCV_PCREL_HI20 is unresolvable, and linker should
issue an unresolvable reloc error.

	bfd/
	* elfnn-riscv.c: Include "objalloc.h" since we need objalloc_alloc.
	(riscv_elf_link_hash_table): Add loc_hash_table and loc_hash_memory
	for local STT_GNU_IFUNC symbols.
	(riscv_elf_got_plt_val): Removed.
	(riscv_elf_local_htab_hash, riscv_elf_local_htab_eq): New functions.
	Use to compare local hash entries.
	(riscv_elf_get_local_sym_hash): New function.  Find a hash entry for
	local symbol, and create a new one if needed.
	(riscv_elf_link_hash_table_free): New function.  Destroy an riscv
	elf linker hash table.
	(riscv_elf_link_hash_table_create): Create hash table for local ifunc.
	(riscv_elf_check_relocs): Create a fake global symbol to track the
	local ifunc symbol.  Add support to check and handle the relocations
	reference to ifunc symbols.
	(allocate_dynrelocs): Let allocate_ifunc_dynrelocs and
	allocate_local_ifunc_dynrelocs to handle the ifunc symbols if they
	are defined and referenced in a non-shared object.
	(allocate_ifunc_dynrelocs): New function.  Allocate space in .plt,
	.got and associated reloc sections for ifunc dynamic relocs.
	(allocate_local_ifunc_dynrelocs): Likewise, but for local ifunc
	dynamic relocs.
	(riscv_elf_relocate_section): Add support to handle the relocation
	referenced to ifunc symbols.
	(riscv_elf_size_dynamic_sections): Updated.
	(riscv_elf_adjust_dynamic_symbol): Updated.
	(riscv_elf_finish_dynamic_symbol): Finish up the ifunc handling,
	including fill the PLT and GOT entries for ifunc symbols.
	(riscv_elf_finish_local_dynamic_symbol): New function.  Called by
	riscv_elf_finish_dynamic_symbol to handle the local ifunc symbols.
	(_bfd_riscv_relax_section): Don't do the relaxation for ifunc.
	* elfxx-riscv.c: Add R_RISCV_IRELATIVE.
	* configure.ac: Link elf-ifunc.lo to use the generic ifunc support.
	* configure: Regenerated.

	include/
	* elf/riscv.h: Add R_RISCV_IRELATIVE to 58.

	ld/
	* emulparams/elf32lriscv-defs.sh: Add IREL_IN_PLT.
	* testsuite/ld-ifunc/ifunc.exp: Enable ifunc tests for RISC-V.
	* testsuite/ld-riscv-elf/ld-riscv-elf.exp (run_dump_test_ifunc):
	New dump test for ifunc.  There are two arguments, 'target` and
	`output`.  The `target` is rv32 or rv64, and the `output` is used
	to choose which output you want to test (exe, pie or .so).
	* testsuite/ld-riscv-elf/ifunc-reloc-call-01.s: New testcase.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-01.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-01-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-01-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-01-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-02.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-02.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-02-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-02-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-call-02-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-data.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-data.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-data-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-data-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-data-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-got.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-got.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-got-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-got-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-got-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-pcrel.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-pcrel.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-pcrel-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-pcrel-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-reloc-pcrel-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-nonplt.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-nonplt.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-nonplt-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-nonplt-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-nonplt-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-01.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-01.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-01-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-01-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-01-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-02.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-02.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-02-exe.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-02-pic.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-plt-02-pie.rd: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-resolver.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-caller.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-exe.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-pic.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-pie.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-caller-pcrel.s: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-pcrel-pic.d: Likewise.
	* testsuite/ld-riscv-elf/ifunc-seperate-pcrel-pie.d: Likewise.
 2020-10-16 10:11:18 +08:00
H.J. Lu
32930e4edb x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker 
GCC 11 supports -march=x86-64-v[234] to enable x86 micro-architecture ISA
levels:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97250

Update GNU_PROPERTY_X86_ISA_1_XXX macros:

https://gitlab.com/x86-psABIs/x86-64-ABI/-/merge_requests/13

in x86 ELF binaries to indicate that micro-architecture ISA levels
required to execute the binary:

 #define GNU_PROPERTY_X86_ISA_1_NEEDED (GNU_PROPERTY_X86_UINT32_OR_LO + 2)
 #define GNU_PROPERTY_X86_ISA_1_USED (GNU_PROPERTY_X86_UINT32_OR_AND_LO + 2)
 #define GNU_PROPERTY_X86_ISA_1_V2 (1U << 0)
 #define GNU_PROPERTY_X86_ISA_1_V3 (1U << 1)
 #define GNU_PROPERTY_X86_ISA_1_V4 (1U << 2)

The previous GNU_PROPERTY_X86_ISA_1_XXX  macros are deprecated and renamed
to GNU_PROPERTY_X86_COMPAT_2_ISA_1_XXX.

In addition to EM_X86_64, GNU_PROPERTY_X86_ISA_1_V[234] marker can be used
by ld.so to detect the x86-64-v4 shared library placed in an x86-64-v2
directory by mistake on an x86-64-v2 machine to avoid crashes on x86-64-v4
instructions.

Add -z x86-64-v[234] linker command line option to mark x86-64-v[234]
ISA level as needed.

Also add

 #define GNU_PROPERTY_X86_FEATURE_2_MASK (1U << 11)

for mask registers.

bfd/

	PR gas/26703
	* elf-linker-x86.h (elf_linker_x86_params): Add isa_level.
	* elfxx-x86.c (_bfd_x86_elf_merge_gnu_properties): Merge
	GNU_PROPERTY_X86_ISA_1_V[234].
	(_bfd_x86_elf_link_setup_gnu_properties): Generate
	GNU_PROPERTY_X86_ISA_1_V[234] for -z x86-64-v[234].

binutils/

	PR gas/26703
	* readelf.c (decode_x86_compat_2_isa): New function.
	(decode_x86_isa): Updated for new X86_ISA_1_XXX bits.
	(decode_x86_feature_1): Handle GNU_PROPERTY_X86_FEATURE_2_MASK.
	(print_gnu_property_note): Handle X86_COMPAT_2_ISA_1_USED,
	and X86_COMPAT_2_ISA_1_NEEDED.
	* testsuite/binutils-all/i386/pr21231b.s: Updated to the current
	GNU_PROPERTY_X86_ISA_1_USED and GNU_PROPERTY_X86_ISA_1_NEEDED
	values.
	* testsuite/binutils-all/x86-64/pr21231b.s: Likewise.
	* testsuite/binutils-all/x86-64/pr23494a.s: Likewise.
	* testsuite/binutils-all/x86-64/pr23494b.s: Likewise.
	* testsuite/binutils-all/x86-64/pr23494c.s: Likewise.
	* testsuite/binutils-all/i386/empty.d: Updated.
	* testsuite/binutils-all/i386/ibt.d: Likewise.
	* testsuite/binutils-all/i386/pr21231a.d: Likewise.
	* testsuite/binutils-all/i386/pr21231b.d: Likewise.
	* testsuite/binutils-all/i386/shstk.d: Likewise.
	* testsuite/binutils-all/x86-64/empty-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/empty.d: Likewise.
	* testsuite/binutils-all/x86-64/ibt-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/ibt.d: Likewise.
	* testsuite/binutils-all/x86-64/pr21231a.d: Likewise.
	* testsuite/binutils-all/x86-64/pr21231b.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494a-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494a.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494c-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494c.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494d-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494d.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494e-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/pr23494e.d: Likewise.
	* testsuite/binutils-all/x86-64/shstk-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/shstk.d: Likewise.

gas/

	PR gas/26703
	* config/tc-i386.c (xstate): Add xstate_mask.
	(md_assemble): Check i.types[j], instead of i.tm.operand_types[j],
	for xstate.  Set xstate_mask, instead of xstate_zmm, for RegMask.
	(output_insn): Update for GNU_PROPERTY_X86_ISA_1_V[234].  Update
	xstate for mask register and VSIB.
	* testsuite/gas/i386/i386.exp: Run more GNU_PROPERTY tests.
	* testsuite/gas/i386/property-1.s: Updated to the current
	GNU_PROPERTY_X86_ISA_1_USED value.
	* testsuite/gas/i386/property-2.s: Only keep cmove.
	* testsuite/gas/i386/property-3.s: Changed to addsubpd.
	* testsuite/gas/i386/property-1.d: Updated.
	* testsuite/gas/i386/property-2.d: Likewise.
	* testsuite/gas/i386/property-3.d: Likewise.
	* testsuite/gas/i386/property-4.d: Likewise.
	* testsuite/gas/i386/property-5.d: Likewise.
	* testsuite/gas/i386/property-6.d: Likewise.
	* testsuite/gas/i386/x86-64-property-1.d: Likewise.
	* testsuite/gas/i386/x86-64-property-2.d: Likewise.
	* testsuite/gas/i386/x86-64-property-3.d: Likewise.
	* testsuite/gas/i386/x86-64-property-4.d: Likewise.
	* testsuite/gas/i386/x86-64-property-5.d: Likewise.
	* testsuite/gas/i386/x86-64-property-6.d: Likewise.
	* testsuite/gas/i386/x86-64-property-7.d: Likewise.
	* testsuite/gas/i386/x86-64-property-8.d: Likewise.
	* testsuite/gas/i386/x86-64-property-9.d: Likewise.
	* testsuite/gas/i386/property-11.d: New file.
	* testsuite/gas/i386/property-11.s: Likewise.
	* testsuite/gas/i386/property-12.d: Likewise.
	* testsuite/gas/i386/property-12.s: Likewise.
	* testsuite/gas/i386/property-13.d: Likewise.
	* testsuite/gas/i386/property-13.s: Likewise.
	* testsuite/gas/i386/x86-64-property-11.d: Likewise.
	* testsuite/gas/i386/x86-64-property-12.d: Likewise.
	* testsuite/gas/i386/x86-64-property-13.d: Likewise.
	* testsuite/gas/i386/x86-64-property-14.d: Likewise.
	* testsuite/gas/i386/x86-64-property-14.s: Likewise.

include/

	PR gas/26703
	* elf/common.h (GNU_PROPERTY_X86_ISA_1_USED): Renamed to ...
	(GNU_PROPERTY_X86_COMPAT_2_ISA_1_USED): This.
	(GNU_PROPERTY_X86_ISA_1_NEEDED): Renamed to ...
	(GNU_PROPERTY_X86_COMPAT_2_ISA_1_NEEDED): This.
	(GNU_PROPERTY_X86_ISA_1_XXX): Renamed to ...
	(GNU_PROPERTY_X86_COMPAT_2_ISA_1_XXX): This.
	(GNU_PROPERTY_X86_ISA_1_NEEDED): New.
	(GNU_PROPERTY_X86_ISA_1_USED): Likewise.
	(GNU_PROPERTY_X86_ISA_1_V2): Likewise.
	(GNU_PROPERTY_X86_ISA_1_V3): Likewise.
	(GNU_PROPERTY_X86_ISA_1_V4): Likewise.
	(GNU_PROPERTY_X86_FEATURE_2_MASK): Likewise.

ld/

	PR gas/26703
	* NEWS: Mention -z x86-64-v[234].
	* ld.texi: Document -z x86-64-v[234].
	* emulparams/elf32_x86_64.sh: Use x86-64-level.sh.
	* emulparams/elf_i386.sh: Likewise.
	* emulparams/elf_x86_64.sh: Likewise.
	* emulparams/x86-64-level.sh: New file.
	* testsuite/ld-elf/x86-feature-1a.rd: Update.
	* testsuite/ld-elf/x86-feature-1b.rd: Likewise.
	* testsuite/ld-elf/x86-feature-1c.rd: Likewise.
	* testsuite/ld-elf/x86-feature-1d.rd: Likewise.
	* testsuite/ld-elf/x86-feature-1e.rd: Likewise.
	* testsuite/ld-i386/pr23372c.d: Likewise.
	* testsuite/ld-i386/pr23486c.d: Likewise.
	* testsuite/ld-i386/pr23486d.d: Likewise.
	* testsuite/ld-i386/pr24322a.d: Likewise.
	* testsuite/ld-i386/pr24322b.d: Likewise.
	* testsuite/ld-i386/property-1a.r: Likewise.
	* testsuite/ld-i386/property-2a.r: Likewise.
	* testsuite/ld-i386/property-3.r: Likewise.
	* testsuite/ld-i386/property-3a.r: Likewise.
	* testsuite/ld-i386/property-4.r: Likewise.
	* testsuite/ld-i386/property-4a.r: Likewise.
	* testsuite/ld-i386/property-5.r: Likewise.
	* testsuite/ld-i386/property-5a.r: Likewise.
	* testsuite/ld-i386/property-7a.r: Likewise.
	* testsuite/ld-i386/property-x86-3.d: Likewise.
	* testsuite/ld-i386/property-x86-4a.d: Likewise.
	* testsuite/ld-i386/property-x86-5.d: Likewise.
	* testsuite/ld-i386/property-x86-cet1.d: Likewise.
	* testsuite/ld-i386/property-x86-cet2a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet5a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet5b.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt1a.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt1b.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt2.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt3a.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt3b.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt4.d: Likewise.
	* testsuite/ld-i386/property-x86-ibt5.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk1a.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk1b.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk2.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk3a.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk3b.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk4.d: Likewise.
	* testsuite/ld-i386/property-x86-shstk5.d: Likewise.
	* testsuite/ld-x86-64/pr23372c-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23372c.d: Likewise.
	* testsuite/ld-x86-64/pr23486c.d: Likewise.
	* testsuite/ld-x86-64/pr23486d-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23486d.d: Likewise.
	* testsuite/ld-x86-64/pr24322a-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24322a.d: Likewise.
	* testsuite/ld-x86-64/pr24322b-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24322b.d: Likewise.
	* testsuite/ld-x86-64/pr24458a-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24458a.d: Likewise.
	* testsuite/ld-x86-64/pr24458b-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24458b.d: Likewise.
	* testsuite/ld-x86-64/pr24458c-x32.d: Likewise.
	* testsuite/ld-x86-64/pr24458c.d: Likewise.
	* testsuite/ld-x86-64/property-1a.r: Likewise.
	* testsuite/ld-x86-64/property-2a.r: Likewise.
	* testsuite/ld-x86-64/property-3.r: Likewise.
	* testsuite/ld-x86-64/property-3a.r: Likewise.
	* testsuite/ld-x86-64/property-4.r: Likewise.
	* testsuite/ld-x86-64/property-4a.r: Likewise.
	* testsuite/ld-x86-64/property-5.r: Likewise.
	* testsuite/ld-x86-64/property-5a.r: Likewise.
	* testsuite/ld-x86-64/property-7a.r: Likewise.
	* testsuite/ld-x86-64/property-x86-3-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-3.d: Likewise.
	* testsuite/ld-x86-64/property-x86-4a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-4a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-5-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-5.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet1-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet1.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt1b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt2-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt3b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt4-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt4.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt5-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-ibt5.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk1b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk2-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk3b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk4-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk4.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk5-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-shstk5.d: Likewise.
	* testsuite/ld-i386/i386.exp: Run property-x86-6,
	property-x86-isa1, property-x86-isa2 and property-x86-isa3.
	* testsuite/ld-i386/property-x86-1.S: Updated to the current
	GNU_PROPERTY_X86_ISA_1_USED and GNU_PROPERTY_X86_ISA_1_NEEDED
	values.
	* testsuite/ld-i386/property-x86-2.S: Likewise.
	* testsuite/ld-i386/property-x86-3.s: Likewise.
	* testsuite/ld-x86-64/pr23372d.s: Likewise.
	* testsuite/ld-x86-64/pr23372e.s: Likewise.
	* testsuite/ld-x86-64/pr23372f.s: Likewise.
	* testsuite/ld-x86-64/pr23486c.s: Likewise.
	* testsuite/ld-x86-64/pr23486d.s: Likewise.
	* testsuite/ld-x86-64/property-x86-1.S: Likewise.
	* testsuite/ld-x86-64/property-x86-2.S: Likewise.
	* testsuite/ld-x86-64/property-x86-3.s: Likewise.
	* testsuite/ld-x86-64/property-x86-5a.s: Likewise.
	* testsuite/ld-x86-64/property-x86-5b.s: Likewise.
	* testsuite/ld-i386/property-x86-6.d: New file.
	* testsuite/ld-i386/property-x86-isa1.d: Likewise.
	* testsuite/ld-i386/property-x86-isa2.d: Likewise.
	* testsuite/ld-i386/property-x86-isa3.d: Likewise.
	* testsuite/ld-x86-64/property-x86-6-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-6.d: Likewise.
	* testsuite/ld-x86-64/property-x86-6.s: Likewise.
	* testsuite/ld-x86-64/property-x86-isa1-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa1.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa1.s: Likewise.
	* testsuite/ld-x86-64/property-x86-isa2-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa2.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa3-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-isa3.d: Likewise.
	* testsuite/ld-x86-64/simple.s: Likewise.
	* ld/testsuite/ld-x86-64/x86-64.exp: Run property-x86-6,
	property-x86-6-x32, property-x86-isa1, property-x86-isa1-x32,
	property-x86-isa2, property-x86-isa2-x32, property-x86-isa3-x32
	and property-x86-isa3.
 2020-10-09 05:13:26 -07:00
H.J. Lu
8d58ed37f1 x86: Add NT_X86_CET note 
Define NT_X86_CET which is the proposed note for x86 CET state to support
Intel CET in Linux kernel.  Double check it after Intel CET patches have
been merged into Linux kernel.

binutils/

	* readelf.c (get_note_type): Support NT_X86_CET.

include/

	* elf/common.h (NT_X86_CET): New.
 2020-09-11 05:52:06 -07:00
Jozef Lawrynowicz
7d81bc937c MSP430: Support relocations for subtract expressions in .uleb128 directives 
Link-time relaxations of branches are common for MSP430, given that GCC
can generate pessimal branch instructions, and the
-mcode-region=either/-mdata-region=either options to shuffle sections
can further change the type of branch instruction required.

These relaxations can result in invalid code when .uleb128
directives, used in the .gcc_except_table section, are used to calculate
the distance between two labels. A value for the .uleb128 directive is
calculated at assembly-time, and can't be updated at link-time, even if
relaxation causes the distance between the labels to change.

This patch adds relocations for subtract expressions in .uleb128
directives, to allow the linker to re-calculate the value of these
expressions after relaxation has been performed.

bfd/ChangeLog:
	* bfd-in2.h (bfd_reloc_code_real): Add
	BFD_RELOC_MSP430_{SET,SUB}_ULEB128.
	* elf32-msp430.c (msp430_elf_ignore_reloc): New.
	(elf_msp430_howto_table): Add R_MSP430{,X}_GNU_{SET,SUB}_ULEB128.
	(msp430_reloc_map): Add R_MSP430_GNU_{SET,SUB}_ULEB128.
	(msp430x_reloc_map): Add R_MSP430X_GNU_{SET,SUB}_ULEB128.
	(write_uleb128): New.
	(msp430_final_link_relocate): Handle R_MSP430{,X}_GNU_{SET,SUB}_ULEB128.
	* libbfd.c (_bfd_write_unsigned_leb128): New.
	* libbfd.h (_bfd_write_unsigned_leb128): New prototype.
	Add BFD_RELOC_MSP430_{SET,SUB}_ULEB128.
	* reloc.c: Document BFD_RELOC_MSP430_{SET,SUB}_ULEB128.

binutils/ChangeLog:
	* readelf.c (target_specific_reloc_handling): Handle
	R_MSP430{,X}_GNU_{SET,SUB}_ULEB128.

gas/ChangeLog:
	* config/tc-msp430.c (msp430_insert_uleb128_fixes): New.
	(msp430_md_end): Call msp430_insert_uleb128_fixes.

include/ChangeLog:
	* elf/msp430.h (elf_msp430_reloc_type): Add
	R_MSP430_GNU_{SET,SUB}_ULEB128.
	(elf_msp430x_reloc_type): Add R_MSP430X_GNU_{SET,SUB}_ULEB128.

ld/ChangeLog:
	* testsuite/ld-msp430-elf/msp430-elf.exp: Run new tests.
	* testsuite/ld-msp430-elf/uleb128.s: New test.
	* testsuite/ld-msp430-elf/uleb128_430.d: New test.
	* testsuite/ld-msp430-elf/uleb128_430x.d: New test.
 2020-09-08 16:18:38 +01:00
Cooper Qu
0861f561eb CSKY: Support attribute section. 
bfd
        * elf32-csky.c (csky_archs): Fix arch names.
        (csky_find_arch_with_name): New.
        (elf32_csky_merge_attributes): New.
        (csky_elf_merge_private_bfd_data): Add process of merge
        attribute section.
        (elf32_csky_obj_attrs_arg_type): New.
        (elf32_csky_obj_attrs_handle_unknown): New.
        (elf_backend_obj_attrs_vendor): Define.
        (elf_backend_obj_attrs_section): Define.
        (elf_backend_obj_attrs_arg_type): Define.
        (elf_backend_obj_attrs_section_type): Define.

binutils/
        * readelf.c (get_csky_section_type_name): New.
        (get_section_type_name): Add handler for CSKY.
        (display_csky_attribute): New.
        (process_arch_specific): Add handler for CSKY.
        * testsuite/binutils-all/strip-3.d: Remove .csky.attributes
        section.

elfcpp/
        * elfcpp.h (enum SHT): New enum SHT_CSKY_ATTRIBUTES.

gas/
        * gas/config/tc-csky.c (md_begin): Set attributes.
        (isa_flag): Change type to unsigned 64 bits.
        (struct csky_cpu_info): Likewise.
        (struct csky_macro_info): Likewise.
        (set_csky_attribute): New.
        * testsuite/gas/csky/802j.d: Ignore .csky.attributes section.
        * testsuite/gas/csky/all.d: Likewise.
        * testsuite/gas/csky/bsr1.d: Likewise.
        * testsuite/gas/csky/csky_vdsp.d: Likewise.
        * testsuite/gas/csky/cskyv2_all.d: Likewise.
        * testsuite/gas/csky/cskyv2_ck803r2.d: Likewise.
        * testsuite/gas/csky/cskyv2_ck860.d: Likewise.
        * testsuite/gas/csky/cskyv2_dsp.d: Likewise.
        * testsuite/gas/csky/cskyv2_elrw.d: Likewise.
        * testsuite/gas/csky/cskyv2_float.d: Likewise.
        * testsuite/gas/csky/enhance_dsp.d: Likewise.
        * testsuite/gas/csky/java.d: Likewise.
        * testsuite/gas/csky/v1_float.d: Likewise.
        * testsuite/gas/csky/v2_float_part1.d: Likewise.
        * testsuite/gas/csky/v2_float_part2.d: Likewise.
        * testsuite/gas/csky/v2_tls_gd.d: Likewise.
        * testsuite/gas/csky/v2_tls_ie.d: Likewise.
        * testsuite/gas/csky/v2_tls_ld.d: Likewise.
        * testsuite/gas/csky/v2_tls_le.d: Likewise.
        * testsuite/gas/elf/elf.exp: Add handler for CSKY.
        * testsuite/gas/elf/section2.e-csky: New.

include/
        * elf/csky.h (SHT_CSKY_ATTRIBUTES): Define.
        (Tag_CSKY_ARCH_NAME): New enum constant.
        (Tag_CSKY_CPU_NAME): Likewise.
        (Tag_CSKY_ISA_FLAGS): Likewise.
        (Tag_CSKY_DSP_VERSION): Likewise.
        (Tag_CSKY_VDSP_VERSION): Likewise.
        (Tag_CSKY_FPU_VERSION): Likewise.
        (Tag_CSKY_FPU_ABI): Likewise.
        (Tag_CSKY_FPU_ROUNDING): Likewise.
        (Tag_CSKY_FPU_DENORMAL): Likewise.
        (Tag_CSKY_FPU_Exception): Likewise.
        (Tag_CSKY_FPU_NUMBER_MODULE): Likewise.
        (Tag_CSKY_FPU_HARDFP): Likewise.
        (Tag_CSKY_MAX): Likewise.
        (VAL_CSKY_DSP_VERSION_EXTENSION): Likewise.
        (VAL_CSKY_DSP_VERSION_2): Likewise.
        (VAL_CSKY_VDSP_VERSION_1): Likewise.
        (VAL_CSKY_VDSP_VERSION_2): Likewise.
        (VAL_CSKY_FPU_ABI_SOFT): Likewise.
        (VAL_CSKY_FPU_ABI_SOFTFP): Likewise.
        (VAL_CSKY_FPU_ABI_HARD): Likewise.
        (VAL_CSKY_FPU_HARDFP_HALF): Likewise.
        (VAL_CSKY_FPU_HARDFP_SINGLE): Likewise.
        (VAL_CSKY_FPU_HARDFP_DOUBLE): Likewise.
        * opcode/csky.h (CSKY_ISA_VDSP_V2): Define.
        CSKYV1_ISA_E1: Change to long constant type.
        CSKYV2_ISA_E1: Likewise.
        CSKYV2_ISA_1E2: Likewise.
        CSKYV2_ISA_2E3: Likewise.
        CSKYV2_ISA_3E7: Likewise.
        CSKYV2_ISA_7E10: Likewise.
        CSKYV2_ISA_3E3R1: Likewise.
        CSKYV2_ISA_3E3R2: Likewise.
        CSKYV2_ISA_10E60: Likewise.
        CSKY_ISA_TRUST: Likewise.
        CSKY_ISA_CACHE: Likewise.
        CSKY_ISA_NVIC: Likewise.
        CSKY_ISA_CP: Likewise.
        CSKY_ISA_MP: Likewise.
        CSKY_ISA_MP_1E2: Likewise.
        CSKY_ISA_JAVA: Likewise.
        CSKY_ISA_MAC: Likewise.
        CSKY_ISA_MAC_DSP: Likewise.
        CSKY_ISA_DSP: Likewise.
        CSKY_ISA_DSP_1E2: Likewise.
        CSKY_ISA_DSP_ENHANCE: Likewise.
        CSKY_ISA_FLOAT_E1: Likewise.
        CSKY_ISA_FLOAT_1E2: Likewise.
        CSKY_ISA_FLOAT_1E3: Likewise.
        CSKY_ISA_FLOAT_3E4: Likewise.
        CSKY_ISA_VDSP: Likewise.

ld/
        * emulparams/cskyelf.sh: Support attribute section.
        * testsuite/ld-csky/tls-le-v1.d: Match .csky.attributes section.
        * ld/testsuite/ld-csky/tls-le.d: Likewise.
        * testsuite/ld-elf/non-contiguous.ld: Ignore .csky.attributes
        section.

opcodes/
        * csky-dis.c (CSKY_DEFAULT_ISA): Define.
        (csky_dis_info): Add member isa.
        (csky_find_inst_info): Skip instructions that do not belong to
        current CPU.
        (csky_get_disassembler): Get infomation from attribute section.
        (print_insn_csky): Set defualt ISA flag.
        * csky.h (CSKY_ISA_VDSP_2): Rename from CSKY_ISA_VDSP_V2.
        * csky-opc.h (struct csky_opcode): Change isa_flag16 and
        isa_flag32'type to unsigned 64 bits.
 2020-08-28 17:23:24 +08:00
Nick Clifton
3eba3ef344 Add support to readelf for the OpenBSD segment types. 
PR 26405
binutils* readelf.c (get_segment_type): Handle OpenBSD segment types.

include	* elf/common.h (PT_OPENBSD_BOOTDATA): Define.
	(PT_OPENBSD_RANDOMIZE): Define.
	(PT_OPENBSD_WXNEEDED): Define.
 2020-08-26 15:15:10 +01:00
Alan Modra
1673aff569 PR26458 UBSAN: elf32-i386.c:3615 left shift of negative value 
Happens when poking symbol index -2 into r_info.  (The index is
updated before writing out to file.)

	PR 26458
	* elf/common.h (ELF32_R_INFO): Cast symbol index to unsigned.
 2020-08-26 23:23:44 +09:30
H.J. Lu
a308b89de7 x86: Support GNU_PROPERTY_X86_FEATURE_2_TMM 
Support GNU_PROPERTY_X86_FEATURE_2_TMM in

https://gitlab.com/x86-psABIs/x86-64-ABI/-/merge_requests/1

 #define GNU_PROPERTY_X86_FEATURE_2_TMM      (1U << 10)

binutils/

	* readelf.c (decode_x86_feature_2): Handle
	GNU_PROPERTY_X86_FEATURE_2_TMM.

gas/

	* config/tc-i386.c (output_insn): Check i.xstate to set
	GNU_PROPERTY_X86_FEATURE_2_TMM.
	* testsuite/gas/i386/i386.exp: Run x86-64-property-7,
	x86-64-property-8 and x86-64-property-9.
	* testsuite/gas/i386/x86-64-property-7.d: New file.
	* testsuite/gas/i386/x86-64-property-7.s: Likewise.
	* testsuite/gas/i386/x86-64-property-8.d: Likewise.
	* testsuite/gas/i386/x86-64-property-8.s: Likewise.
	* testsuite/gas/i386/x86-64-property-9.d: Likewise.
	* testsuite/gas/i386/x86-64-property-9.s: Likewise.

include/

	* elf/common.h (GNU_PROPERTY_X86_FEATURE_2_TMM): New.
 2020-07-11 04:04:20 -07:00
John Baldwin
fc238d4a06 Support several new ELF auxiliary vector types on FreeBSD. 
FreeBSD's kernel recently added several ELF auxiliary vector entries
to describe the arguments passed to new executable images during
exec().  The AT_FREEBSD_ARGC and AT_FREEBSD_ARGV entries give the
length and address of the process argument array.  AT_FREEBSD_ENVC and
AT_FREEBSD_ENVV entries give the length and address of the initial
process environment.  AT_FREEBSD_PS_STRINGS gives the address of the
'struct ps_strings' object.

include/ChangeLog:

	* elf/common.h (AT_FREEBSD_ARGC, AT_FREEBSD_ARGV, AT_FREEBSD_ENVC)
	(AT_FREEBSD_ENVV, AT_FREEBSD_PS_STRINGS): Define.

gdb/ChangeLog:

	* fbsd-tdep.c (fbsd_print_auxv_entry): Handle AT_FREEBSD_ARGC,
	AT_FREEBSD_ARGV, AT_FREEBSD_ENVC, AT_FREEBSD_ENVV,
	AT_FREEBSD_PS_STRINGS.
 2020-07-09 09:39:05 -07:00
Alan Modra
279edac53d C++ comments 
binutils isn't c99 (yet).  This replaces or removes some C++ style
comments.

bfd/
	* arc-got.h: Use C style comments.
	* coff-z80.c: Likewise.
	* elf32-csky.c: Likewise.
	* peXXigen.c: Likewise.
	* elf32-m32c.c (m32c_elf_relax_delete_bytes): Remove commented out
	code.
binutils/
	* dwarf.c: Use C style comments.
	* resrc.c: Likewise.
gas/
	* config/tc-s12z.c: Use C style comments.
	* config/tc-z80.c: Likewise.
	* config/tc-xtensa.c (emit_ld_r_n): Remove commented out code.
include/
	* coff/internal.h: Use C style comments.
	* coff/pe.h: Likewise.
	* elf/ppc64.h: Likewise.
opcodes/
	* arm-dis.c: Use C style comments.
	* cr16-opc.c: Likewise.
	* ft32-dis.c: Likewise.
	* moxie-opc.c: Likewise.
	* tic54x-dis.c: Likewise.
	* s12z-opc.c: Remove useless comment.
	* xgate-dis.c: Likewise.
 2020-06-29 10:07:56 +09:30
Pat Bernardi
85f7484a3a m68k: tag floating-point ABI used 
This patch adds GNU attribute support to m68k and utilises it to tag the
floating-point calling convention used (hard-float or soft-float). It enables
the linker to ensure linked objects use a consistent floating-point ABI and
allows tools like GDB to infer the ABI used from the ELF file. It is based on
similar work done for PowerPC.

bfd/
	* elf32-m68k.c (m68k_elf_merge_obj_attributes): New function.
	(elf32_m68k_merge_private_bfd_data): Merge GNU attributes.
binutils/
	* readelf.c (display_m68k_gnu_attribute): New function.
	(process_arch_specific): Call display_m68k_gnu_attribute for EM_68K.
gas/
	* config/tc-m68k.c (m68k_elf_gnu_attribute): New function.
	(md_pseudo_table): Handle "gnu_attribute".
	* doc/as.texi: Document GNU attribute for M68K.
include/
	* elf/m68k.h: Add enum for GNU object attribute with floating point
	tag name and values.
ld/
	* testsuite/ld-m68k/attr-gnu-4-0.s: New file.
	* testsuite/ld-m68k/attr-gnu-4-1.s: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-2.s: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-00.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-01.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-02.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-10.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-11.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-12.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-20.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-21.d: Likewise.
	* testsuite/ld-m68k/attr-gnu-4-22.d: Likewise.
	* testsuite/ld-m68k/m68k.exp: Run the new tests.
 2020-06-26 14:42:19 +09:30