Commit 351cdf24 authored by Matthew Fortune's avatar Matthew Fortune
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[MIPS] Implement O32 FPXX, FP64 and FP64A ABI extensions

Specification:
https://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking

include/

	* elf/mips.h (PT_MIPS_ABIFLAGS, SHT_MIPS_ABIFLAGS): Define.
	(Val_GNU_MIPS_ABI_FP_OLD_64): Rename from Val_GNU_MIPS_ABI_FP_64.
	(Val_GNU_MIPS_ABI_FP_64): Redefine.
	(Val_GNU_MIPS_ABI_FP_XX): Define.
	(Elf_External_ABIFlags_v0, Elf_Internal_ABIFlags_v0): New structures.
	(AFL_REG_NONE, AFL_REG_32, AFL_REG_64, AFL_REG_128): Define.
	(AFL_ASE_DSP, AFL_ASE_DSPR2, AFL_ASE_EVA, AFL_ASE_MCU): Likewise.
	(AFL_ASE_MDMX, AFL_ASE_MIPS3D, AFL_ASE_MT, AFL_ASE_SMARTMIPS): Likewise.
	(AFL_ASE_VIRT, AFL_ASE_MSA, AFL_ASE_MIPS16): Likewise.
	(AFL_ASE_MICROMIPS, AFL_ASE_XPA): Likewise.
	(AFL_EXT_XLR, AFL_EXT_OCTEON2, AFL_EXT_OCTEONP): Likewise.
	(AFL_EXT_LOONGSON_3A, AFL_EXT_OCTEON, AFL_EXT_5900): Likewise.
	(AFL_EXT_4650, AFL_EXT_4010, AFL_EXT_4100, AFL_EXT_3900): Likewise.
	(AFL_EXT_10000, AFL_EXT_SB1, AFL_EXT_4111, AFL_EXT_4120): Likewise.
	(AFL_EXT_5400, AFL_EXT_5500, AFL_EXT_LOONGSON_2E): Likewise.
	(AFL_EXT_LOONGSON_2F): Likewise.
	(bfd_mips_elf_swap_abiflags_v0_in): Prototype.
	(bfd_mips_elf_swap_abiflags_v0_out): Likewise.
	(bfd_mips_isa_ext): Likewise.

bfd/

	* elfxx-mips.c (ABI_O32_P, MIPS_ELF_ABIFLAGS_SECTION_NAME_P): New macro.
	(mips_elf_obj_tdata): Add abiflags and abiflags_valid fields.
	(bfd_mips_elf_swap_abiflags_v0_in): New function.
	(bfd_mips_elf_swap_abiflags_v0_out): Likewise.
	(_bfd_mips_elf_section_from_shdr): Handle SHT_MIPS_ABIFLAGS.
	(_bfd_mips_elf_fake_sections): Likewise.
	(_bfd_mips_elf_always_size_sections): Handle .MIPS.abiflags.
	(_bfd_mips_elf_additional_program_headers): Account for new
	PT_MIPS_ABIFLAGS program header.
	(_bfd_mips_elf_modify_segment_map): Create PT_MIPS_ABIFLAGS segment and
	associate with .MIPS.abiflags.
	(_bfd_mips_elf_gc_mark_extra_sections): New function.
	(bfd_mips_isa_ext, update_mips_abiflags_isa): New static function.
	(infer_mips_abiflags): Likewise.
	(_bfd_mips_elf_final_link): Handle .MIPS.abiflags.
	(mips_32bit_flags_p): Moved higher.
	(mips_elf_merge_obj_attributes, _bfd_mips_fp_abi_string): Error
	checking for FP ABIs.
	(_bfd_mips_elf_merge_private_bfd_data): Restructure and add abiflags
	checks.  Check EF_MIPS_FP64 flag consistency.
	(print_mips_ases, print_mips_isa_ext): New static function.
	(print_mips_fp_abi_value, get_mips_reg_size): Likewise.
	(_bfd_mips_elf_print_private_bfd_data): Display abiflags data.
	(_bfd_mips_post_process_headers): Set EI_ABIVERSION = 3 for
	Val_GNU_MIPS_ABI_FP_64 or Val_GNU_MIPS_ABI_FP_64A.
	* elfxx-mips.h (_bfd_mips_elf_gc_mark_extra_sections): New prototype.
	* elf32-mips.c (elf_backend_gc_mark_extra_sections): Implement.
	* elfn32-mips.c (elf_backend_gc_mark_extra_sections): Implement.
	* elf64-mips.c (elf_backend_gc_mark_extra_sections): Implement.

binutils/

	* readelf.c (get_mips_segment_type): Display name for PT_MIPS_ABIFLAGS.
	(get_mips_section_type_name): Display name for SHT_MIPS_ABIFLAGS.
	(display_mips_gnu_attribute): Abstracted fp abi printing to...
	(print_mips_fp_abi_value): New static function. Handle new FP ABIs.
	(print_mips_ases, print_mips_isa_ext): New static functions.
	(get_mips_reg_size): Likewise.
	(process_mips_specific): Display abiflags data.

elfcpp/

	* elfcpp.h (PT_MIPS_ABIFLAGS): New program header type.

gas/

	* config/tc-mips.c (mips_flags_frag): New static global.
	(struct mips_set_options): Add oddspreg field.
	(file_mips_opts, mips_opts): Initialize oddspreg.
	(ISA_HAS_ODD_SINGLE_FPR): Add CPU argument and update for R5900 and
	Loongson-3a.
	(enum options, md_longopts, md_parse_option): Add -mfpxx, -modd-spreg
	and -mno-odd-spreg options.
	(md_begin): Create .MIPS.abiflags section.
	(fpabi_incompatible_with, fpabi_requires): New static function.
	(check_fpabi): Likewise.
	(mips_check_options): Handle fp=xx and oddspreg restrictions.
	(file_mips_check_options): Set oddspreg by default for fp=xx.
	(mips_oddfpreg_ok): Re-write function.
	(check_regno): Check odd numbered registers regardless of FPR size.
	For fp != 32 use as_bad instead of as_warn.
	(match_float_constant): Rewrite check regarding FP register width.  Add
	support for generating constants when MXHC1 is present.  Handle fp=xx
	to comply with the ABI.
	(macro): Update M_LI_DD similarly to match_float_constant.  Generate
	MTHC1 when available.  Check that correct code can be generated for
	fp=xx and fp=64 ABIs.
	(parse_code_option, s_mipsset): Add fp=xx, oddspreg and nooddspreg
	options.
	(mips_convert_ase_flags): New static function.
	(mips_elf_final_processing): Use fpabi == Val_GNU_MIPS_ABI_FP_OLD_64
	to determine when to add the EF_MIPS_FP64 flag.  Populate the
	.MIPS.abiflags section.
	(md_mips_end): Update .gnu_attribute based on command line and .module
	as applicable.  Use check_fpabi to ensure .gnu.attribute and command
	line/.module options are consistent.
	* doc/as.texinfo: Add missing -mgp64/-mfp64 options and document new
	-mfpxx, -modd-spreg and -mno-odd-spreg options.
	* doc/c-mips.texi: Document -mfpxx, -modd-spreg, -mno-odd-spreg,
	gnu_attribute values and FP ABIs.

ld/

	* emulparams/elf32bmip.sh: Add .MIPS.abiflags.
	* emulparams/elf32bmipn32-defs.sh: Likewise.
	* emulparams/elf64bmip-defs.sh: Likewise.

opcodes/

	* micromips-opc.c (COD, LCD) New macros.
	(cfc1, ctc1): Remove FP_S attribute.
	(dmfc1, mfc1, mfhc1): Add LCD attribute.
	(dmtc1, mtc1, mthc1): Add COD attribute.
	* mips-opc.c (cfc1, cftc1, ctc, cttc1): Remove FP_S attribute.

binutils/testsuite/

	* binutils-all/readelf.s: Account for .MIPS.abiflags and
	.gnu.attributes.
	* binutils-all/readelf.ss-tmips: Likewise.
	* binutils-all/strip-3.d: Likewise.

gas/testsuite/

	* gas/mips/attr-gnu-4-0.d: New.
	* gas/mips/attr-gnu-4-0.s: Likewise.
	* gas/mips/attr-gnu-4-1-mfp32.l: Likewise.
	* gas/mips/attr-gnu-4-1-mfp32.s: Likewise.
	* gas/mips/attr-gnu-4-1-mfp64.l: Likewise.
	* gas/mips/attr-gnu-4-1-mfp64.s: Likewise.
	* gas/mips/attr-gnu-4-1-mfpxx.s: Likewise.
	* gas/mips/attr-gnu-4-1-msingle-float.l: Likewise.
	* gas/mips/attr-gnu-4-1-msingle-float.s: Likewise.
	* gas/mips/attr-gnu-4-1-msoft-float.l: Likewise.
	* gas/mips/attr-gnu-4-1-msoft-float.s: Likewise.
	* gas/mips/attr-gnu-4-1.d: Likewise.
	* gas/mips/attr-gnu-4-1.s: Likewise.
	* gas/mips/attr-gnu-4-2-mdouble-float.l: Likewise.
	* gas/mips/attr-gnu-4-2-mdouble-float.s: Likewise.
	* gas/mips/attr-gnu-4-2-msoft-float.l: Likewise.
	* gas/mips/attr-gnu-4-2-msoft-float.s: Likewise.
	* gas/mips/attr-gnu-4-2.d: Likewise.
	* gas/mips/attr-gnu-4-2.s: Likewise.
	* gas/mips/attr-gnu-4-3-mhard-float.l: Likewise.
	* gas/mips/attr-gnu-4-3-mhard-float.s: Likewise.
	* gas/mips/attr-gnu-4-3.d: Likewise.
	* gas/mips/attr-gnu-4-3.s: Likewise.
	* gas/mips/attr-gnu-4-4.l: Likewise.
	* gas/mips/attr-gnu-4-4.s: Likewise.
	* gas/mips/attr-gnu-4-5-64.l: Likewise.
	* gas/mips/attr-gnu-4-5-64.s: Likewise.
	* gas/mips/attr-gnu-4-5.d: Likewise.
	* gas/mips/attr-gnu-4-5.l: Likewise.
	* gas/mips/attr-gnu-4-5.s: Likewise.
	* gas/mips/attr-gnu-4-6-64.l: Likewise.
	* gas/mips/attr-gnu-4-6-64.s: Likewise.
	* gas/mips/attr-gnu-4-6.d: Likewise.
	* gas/mips/attr-gnu-4-6.l: Likewise.
	* gas/mips/attr-gnu-4-6.s: Likewise.
	* gas/mips/attr-gnu-4-6-msingle-float.l: Likewise.
	* gas/mips/attr-gnu-4-6-msingle-float.s: Likewise.
	* gas/mips/attr-gnu-4-6-msoft-float.l: Likewise.
	* gas/mips/attr-gnu-4-6-msoft-float.s: Likewise.
	* gas/mips/attr-gnu-4-6-noodd.l: Likewise.
	* gas/mips/attr-gnu-4-6-noodd.s: Likewise.
	* gas/mips/attr-gnu-4-7-64.l: Likewise.
	* gas/mips/attr-gnu-4-7-64.s: Likewise.
	* gas/mips/attr-gnu-4-7-msingle-float.l: Likewise.
	* gas/mips/attr-gnu-4-7-msingle-float.s: Likewise.
	* gas/mips/attr-gnu-4-7-msoft-float.l: Likewise.
	* gas/mips/attr-gnu-4-7-msoft-float.s: Likewise.
	* gas/mips/attr-gnu-4-7-odd.l: Likewise.
	* gas/mips/attr-gnu-4-7-odd.s: Likewise.
	* gas/mips/attr-gnu-4-7.d: Likewise.
	* gas/mips/attr-gnu-4-7.l: Likewise.
	* gas/mips/attr-gnu-4-7.s: Likewise.
	* gas/mips/attr-none-double.d: Likewise.
	* gas/mips/attr-none-o32-fp64.d: Likewise.
	* gas/mips/attr-none-o32-fp64-nooddspreg.d
	* gas/mips/attr-none-o32-fpxx.d: Likewise.
	* gas/mips/attr-none-single-float.d: Likewise.
	* gas/mips/attr-none-soft-float.d: Likewise.
	* gas/mips/elf_arch_mips32r3.d: Likewise.
	* gas/mips/elf_arch_mips32r5.d: Likewise.
	* gas/mips/elf_arch_mips64r3.d: Likewise.
	* gas/mips/elf_arch_mips64r5.d: Likewise.
	* gas/mips/li-d.d: Likewise.
	* gas/mips/li-d.s: Likewise.
	* gas/mips/module-check-warn.l: Likewise.
	* gas/mips/module-check-warn.s: Likewise.
	* gas/mips/module-check.d: Likewise.
	* gas/mips/module-check.s: Likewise.
	* gas/mips/module-mfp32.d: Likewise.
	* gas/mips/module-mfp32.s: Likewise.
	* gas/mips/module-mfp64.d: Likewise.
	* gas/mips/module-mfp64.s: Likewise.
	* gas/mips/module-mfp64-noodd.d: Likewise.
	* gas/mips/module-mfp64-noodd.s: Likewise.
	* gas/mips/module-mfpxx.d: Likewise.
	* gas/mips/module-mfpxx.s: Likewise.
	* gas/mips/module-msingle-float.d: Likewise.
	* gas/mips/module-msingle-float.s: Likewise.
	* gas/mips/module-msoft-float.d: Likewise.
	* gas/mips/module-msoft-float.s: Likewise.
	* gas/mips/module-set-mfpxx.d: Likewise.
	* gas/mips/module-set-mfpxx.s: Likewise.
	* gas/mips/fpxx-oddfpreg.d: Likewise.
	* gas/mips/fpxx-oddfpreg.l: Likewise.
	* gas/mips/fpxx-oddfpreg.s: Likewise.
	* gas/mips/no-odd-spreg.d: Likewise.
	* gas/mips/odd-spreg.d: Likewise.
	* gas/elf/section2.e-mips: Adjust expected output.
	* gas/mips/attr-gnu-abi-fp-1.d: Likewise.
	* gas/mips/attr-gnu-abi-msa-1.d: Likewise.
	* gas/mips/call-nonpic-1.d: Likewise.
	* gas/mips/elf_arch_mips1.d: Likewise.
	* gas/mips/elf_arch_mips2.d: Likewise.
	* gas/mips/elf_arch_mips3.d: Likewise.
	* gas/mips/elf_arch_mips32.d: Likewise.
	* gas/mips/elf_arch_mips32r2.d: Likewise.
	* gas/mips/elf_arch_mips4.d: Likewise.
	* gas/mips/elf_arch_mips5.d: Likewise.
	* gas/mips/elf_arch_mips64.d: Likewise.
	* gas/mips/elf_arch_mips64r2.d: Likewise.
	* gas/mips/elf_ase_micromips-2.d: Likewise.
	* gas/mips/elf_ase_micromips.d: Likewise.
	* gas/mips/elf_ase_mips16-2.d: Likewise.
	* gas/mips/elf_ase_mips16.d: Likewise.
	* gas/mips/module-defer-warn1.d: Likewise.
	* gas/mips/module-override.d: Likewise.
	* gas/mips/n32-consec.d: Likewise.
	* gas/mips/nan-2008-1.d: Likewise.
	* gas/mips/nan-2008-2.d: Likewise.
	* gas/mips/nan-2008-3.d: Likewise.
	* gas/mips/nan-2008-4.d: Likewise.
	* gas/mips/nan-legacy-1.d: Likewise.
	* gas/mips/nan-legacy-2.d: Likewise.
	* gas/mips/nan-legacy-3.d: Likewise.
	* gas/mips/nan-legacy-4.d: Likewise.
	* gas/mips/nan-legacy-5.d: Likewise.
	* gas/mips/tmips16-e.d: Likewise.
	* gas/mips/tmips16-f.d: Likewise.
	* gas/mips/tmipsel16-e.d: Likewise.
	* gas/mips/tmipsel16-f.d: Likewise.
	* gas/testsuite/gas/mips/mips.exp: Add new tests.

ld/testsuite/

	* ld-mips-elf/abiflags-strip1-ph.d: New.
	* ld-mips-elf/abiflags-strip2-ph.d: Likewise.
	* ld-mips-elf/abiflags-strip3-ph.d: Likewise.
	* ld-mips-elf/abiflags-strip4-ph.d: Likewise.
	* ld-mips-elf/abiflags-strip5-ph.d: Likewise.
	* ld-mips-elf/abiflags-strip6-ph.d: Likewise.
	* ld-mips-elf/abiflags-strip7-ph.d: Likewise.
	* ld-mips-elf/abiflags-strip8-ph.d: Likewise.
	* ld-mips-elf/abiflags-strip9-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-0-n32-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-0-n64-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-0-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-06.d: Likewise.
	* ld-mips-elf/attr-gnu-4-07.d: Likewise.
	* ld-mips-elf/attr-gnu-4-08.d: Likewise.
	* ld-mips-elf/attr-gnu-4-1-n32-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-1-n64-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-1-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-16.d: Likewise.
	* ld-mips-elf/attr-gnu-4-17.d: Likewise.
	* ld-mips-elf/attr-gnu-4-18.d: Likewise.
	* ld-mips-elf/attr-gnu-4-2-n32-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-2-n64-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-2-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-26.d: Likewise.
	* ld-mips-elf/attr-gnu-4-27.d: Likewise.
	* ld-mips-elf/attr-gnu-4-28.d: Likewise.
	* ld-mips-elf/attr-gnu-4-3-n32-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-3-n64-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-3-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-36.d: Likewise.
	* ld-mips-elf/attr-gnu-4-37.d: Likewise.
	* ld-mips-elf/attr-gnu-4-38.d: Likewise.
	* ld-mips-elf/attr-gnu-4-4-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-46.d: Likewise.
	* ld-mips-elf/attr-gnu-4-47.d: Likewise.
	* ld-mips-elf/attr-gnu-4-48.d: Likewise.
	* ld-mips-elf/attr-gnu-4-5-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-50.d: Likewise.
	* ld-mips-elf/attr-gnu-4-52.d: Likewise.
	* ld-mips-elf/attr-gnu-4-53.d: Likewise.
	* ld-mips-elf/attr-gnu-4-54.d: Likewise.
	* ld-mips-elf/attr-gnu-4-55.d: Likewise.
	* ld-mips-elf/attr-gnu-4-56.d: Likewise.
	* ld-mips-elf/attr-gnu-4-57.d: Likewise.
	* ld-mips-elf/attr-gnu-4-58.d: Likewise.
	* ld-mips-elf/attr-gnu-4-6-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-6.s: Likewise.
	* ld-mips-elf/attr-gnu-4-60.d: Likewise.
	* ld-mips-elf/attr-gnu-4-61.d: Likewise.
	* ld-mips-elf/attr-gnu-4-62.d: Likewise.
	* ld-mips-elf/attr-gnu-4-63.d: Likewise.
	* ld-mips-elf/attr-gnu-4-64.d: Likewise.
	* ld-mips-elf/attr-gnu-4-65.d: Likewise.
	* ld-mips-elf/attr-gnu-4-66.d: Likewise.
	* ld-mips-elf/attr-gnu-4-67.d: Likewise.
	* ld-mips-elf/attr-gnu-4-68.d: Likewise.
	* ld-mips-elf/attr-gnu-4-7-ph.d: Likewise.
	* ld-mips-elf/attr-gnu-4-7.s: Likewise.
	* ld-mips-elf/attr-gnu-4-70.d: Likewise.
	* ld-mips-elf/attr-gnu-4-71.d: Likewise.
	* ld-mips-elf/attr-gnu-4-72.d: Likewise.
	* ld-mips-elf/attr-gnu-4-73.d: Likewise.
	* ld-mips-elf/attr-gnu-4-74.d: Likewise.
	* ld-mips-elf/attr-gnu-4-75.d: Likewise.
	* ld-mips-elf/attr-gnu-4-76.d: Likewise.
	* ld-mips-elf/attr-gnu-4-77.d: Likewise.
	* ld-mips-elf/attr-gnu-4-78.d: Likewise.
	* ld-mips-elf/attr-gnu-4-8.s: Likewise.
	* ld-mips-elf/attr-gnu-4-81.d: Likewise.
	* ld-mips-elf/empty.s: Likewise.
	* ld-mips-elf/attr-gnu-4-00.d: Adjust expected output.
	* ld-mips-elf/attr-gnu-4-01.d: Likewise.
	* ld-mips-elf/attr-gnu-4-02.d: Likewise.
	* ld-mips-elf/attr-gnu-4-03.d: Likewise.
	* ld-mips-elf/attr-gnu-4-04.d: Likewise.
	* ld-mips-elf/attr-gnu-4-05.d: Likewise.
	* ld-mips-elf/attr-gnu-4-10.d: Likewise.
	* ld-mips-elf/attr-gnu-4-11.d: Likewise.
	* ld-mips-elf/attr-gnu-4-14.d: Likewise.
	* ld-mips-elf/attr-gnu-4-15.d: Likewise.
	* ld-mips-elf/attr-gnu-4-2.s: Likewise.
	* ld-mips-elf/attr-gnu-4-20.d: Likewise.
	* ld-mips-elf/attr-gnu-4-22.d: Likewise.
	* ld-mips-elf/attr-gnu-4-24.d: Likewise.
	* ld-mips-elf/attr-gnu-4-25.d: Likewise.
	* ld-mips-elf/attr-gnu-4-3.s: Likewise.
	* ld-mips-elf/attr-gnu-4-30.d: Likewise.
	* ld-mips-elf/attr-gnu-4-33.d: Likewise.
	* ld-mips-elf/attr-gnu-4-34.d: Likewise.
	* ld-mips-elf/attr-gnu-4-35.d: Likewise.
	* ld-mips-elf/attr-gnu-4-40.d: Likewise.
	* ld-mips-elf/attr-gnu-4-41.d: Likewise.
	* ld-mips-elf/attr-gnu-4-42.d: Likewise.
	* ld-mips-elf/attr-gnu-4-43.d: Likewise.
	* ld-mips-elf/attr-gnu-4-44.d: Likewise.
	* ld-mips-elf/attr-gnu-4-45.d: Likewise.
	* ld-mips-elf/attr-gnu-4-5.s: Likewise.
	* ld-mips-elf/attr-gnu-4-51.d: Likewise.
	* ld-mips-elf/attr-gnu-8-00.d: Likewise.
	* ld-mips-elf/attr-gnu-8-01.d: Likewise.
	* ld-mips-elf/attr-gnu-8-02.d: Likewise.
	* ld-mips-elf/attr-gnu-8-10.d: Likewise.
	* ld-mips-elf/attr-gnu-8-11.d: Likewise.
	* ld-mips-elf/attr-gnu-8-20.d: Likewise.
	* ld-mips-elf/attr-gnu-8-22.d: Likewise.
	* ld-mips-elf/jalx-2.dd: Likewise.
	* ld-mips-elf/mips16-pic-1.gd: Likewise.
	* ld-mips-elf/mips16-pic-2.gd: Likewise.
	* ld-mips-elf/mips16-pic-3.gd: Likewise.
	* ld-mips-elf/mips16-pic-4a.gd: Likewise.
	* ld-mips-elf/multi-got-no-shared.d: Likewise.
	* ld-mips-elf/nan-2008.d: Likewise.
	* ld-mips-elf/nan-legacy.d: Rework test.
	* ld-mips-elf/pic-and-nonpic-3a.gd: Likewise.
	* ld-mips-elf/pic-and-nonpic-3b.gd: Likewise.
	* ld-mips-elf/pic-and-nonpic-5b.gd: Likewise.
	* ld-mips-elf/pic-and-nonpic-6.ld: Likewise.
	* ld-mips-elf/rel32-n32.d: Likewise.
	* ld-mips-elf/rel32-o32.d: Likewise.
	* ld-mips-elf/rel64.d: Likewise.
	* ld-mips-elf/tls-multi-got-1.r: Likewise.
	* ld-elf/group.ld: Discard .MIPS.abiflags and .gnu.attributes.
	* ld-elf/orphan-region.ld: Likewise.
	* ld-elf/orphan.ld: Likewise.
	* ld-mips-elf/compressed-plt-1.ld: Likewise.
	* ld-mips-elf/dyn-sec64.ld: Likewise.
	* ld-mips-elf/got-dump-1.ld: Likewise.
	* ld-mips-elf/got-dump-2.ld: Likewise.
	* ld-mips-elf/got-page-1.ld: Likewise.
	* ld-mips-elf/mips-dyn.ld: Likewise.
	* ld-mips-elf/mips-lib.ld: Likewise.
	* ld-mips-elf/pic-and-nonpic-3a.ld: Likewise.
	* ld-mips-elf/pic-and-nonpic-3b.ld: Likewise.
	* ld-mips-elf/pic-and-nonpic-4b.ld: Likewise.
	* ld-mips-elf/pic-and-nonpic-5b.ld: Likewise.
	* ld-mips-elf/region1.t: Likewise.
	* ld-mips-elf/stub-dynsym-1.ld: Likewise.
	* ld-mips-elf/tls-hidden3.ld: Likewise.
	* ld-mips-elf/vxworks1.ld: Likewise.
	* ld-scripts/overlay-size.t: Likewise.
	* ld-mips-elf/elf-rel-got-n32-embed.d: Remove .MIPS.abiflags from
	objects.
	* ld-mips-elf/elf-rel-got-n32.d: Likewise.
	* ld-mips-elf/elf-rel-got-n64-embed.d: Likewise.
	* ld-mips-elf/elf-rel-got-n64-linux.d: Likewise.
	* ld-mips-elf/elf-rel-got-n64.d: Likewise.
	* ld-mips-elf/elf-rel-xgot-n32.d: Likewise.
	* ld-mips-elf/elf-rel-xgot-n32-embed.d: Likewise.
	* ld-mips-elf/elf-rel-xgot-n64.d: Likewise.
	* ld-mips-elf/elf-rel-xgot-n64-linux.d: Likewise.
	* ld-mips-elf/elf-rel-xgot-n64-embed.d: Likewise.
	* ld-mips-elf/mips-elf.exp: Add new tests.
parent 7e09a223
2014-07-29 Matthew Fortune <matthew.fortune@imgtec.com>
* elfxx-mips.c (ABI_O32_P, MIPS_ELF_ABIFLAGS_SECTION_NAME_P): New macro.
(mips_elf_obj_tdata): Add abiflags and abiflags_valid fields.
(bfd_mips_elf_swap_abiflags_v0_in): New function.
(bfd_mips_elf_swap_abiflags_v0_out): Likewise.
(_bfd_mips_elf_section_from_shdr): Handle SHT_MIPS_ABIFLAGS.
(_bfd_mips_elf_fake_sections): Likewise.
(_bfd_mips_elf_always_size_sections): Handle .MIPS.abiflags.
(_bfd_mips_elf_additional_program_headers): Account for new
PT_MIPS_ABIFLAGS program header.
(_bfd_mips_elf_modify_segment_map): Create PT_MIPS_ABIFLAGS segment and
associate with .MIPS.abiflags.
(_bfd_mips_elf_gc_mark_extra_sections): New function.
(bfd_mips_isa_ext, update_mips_abiflags_isa): New static function.
(infer_mips_abiflags): Likewise.
(_bfd_mips_elf_final_link): Handle .MIPS.abiflags.
(mips_32bit_flags_p): Moved higher.
(mips_elf_merge_obj_attributes, _bfd_mips_fp_abi_string): Error
checking for FP ABIs.
(_bfd_mips_elf_merge_private_bfd_data): Restructure and add abiflags
checks. Check EF_MIPS_FP64 flag consistency.
(print_mips_ases, print_mips_isa_ext): New static function.
(print_mips_fp_abi_value, get_mips_reg_size): Likewise.
(_bfd_mips_elf_print_private_bfd_data): Display abiflags data.
(_bfd_mips_post_process_headers): Set EI_ABIVERSION = 3 for
Val_GNU_MIPS_ABI_FP_64 or Val_GNU_MIPS_ABI_FP_64A.
* elfxx-mips.h (_bfd_mips_elf_gc_mark_extra_sections): New prototype.
* elf32-mips.c (elf_backend_gc_mark_extra_sections): Implement.
* elfn32-mips.c (elf_backend_gc_mark_extra_sections): Implement.
* elf64-mips.c (elf_backend_gc_mark_extra_sections): Implement.
2014-07-28 Alan Modra <amodra@gmail.com>
PR 13227
......
......@@ -2315,6 +2315,8 @@ static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
#define elf_backend_collect TRUE
#define elf_backend_type_change_ok TRUE
#define elf_backend_can_gc_sections TRUE
#define elf_backend_gc_mark_extra_sections \
_bfd_mips_elf_gc_mark_extra_sections
#define elf_info_to_howto mips_info_to_howto_rela
#define elf_info_to_howto_rel mips_info_to_howto_rel
#define elf_backend_sym_is_global mips_elf_sym_is_global
......
......@@ -4185,6 +4185,8 @@ const struct elf_size_info mips_elf64_size_info =
#define elf_backend_collect TRUE
#define elf_backend_type_change_ok TRUE
#define elf_backend_can_gc_sections TRUE
#define elf_backend_gc_mark_extra_sections \
_bfd_mips_elf_gc_mark_extra_sections
#define elf_info_to_howto mips_elf64_info_to_howto_rela
#define elf_info_to_howto_rel mips_elf64_info_to_howto_rel
#define elf_backend_object_p mips_elf64_object_p
......
......@@ -3410,6 +3410,8 @@ static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
#define elf_backend_collect TRUE
#define elf_backend_type_change_ok TRUE
#define elf_backend_can_gc_sections TRUE
#define elf_backend_gc_mark_extra_sections \
_bfd_mips_elf_gc_mark_extra_sections
#define elf_info_to_howto mips_info_to_howto_rela
#define elf_info_to_howto_rel mips_info_to_howto_rel
#define elf_backend_sym_is_global mips_elf_sym_is_global
......
This diff is collapsed.
......@@ -157,6 +157,8 @@ extern bfd_vma _bfd_mips_elf_plt_sym_val
(bfd_vma, const asection *, const arelent *rel);
extern long _bfd_mips_elf_get_synthetic_symtab
(bfd *, long, asymbol **, long, asymbol **, asymbol **);
extern bfd_boolean _bfd_mips_elf_gc_mark_extra_sections
(struct bfd_link_info *, elf_gc_mark_hook_fn);
extern void _bfd_mips_post_process_headers
(bfd *abfd, struct bfd_link_info *link_info);
......
2014-07-29 Matthew Fortune <matthew.fortune@imgtec.com>
* readelf.c (get_mips_segment_type): Display name for PT_MIPS_ABIFLAGS.
(get_mips_section_type_name): Display name for SHT_MIPS_ABIFLAGS.
(display_mips_gnu_attribute): Abstracted fp abi printing to...
(print_mips_fp_abi_value): New static function. Handle new FP ABIs.
(print_mips_ases, print_mips_isa_ext): New static functions.
(get_mips_reg_size): Likewise.
(process_mips_specific): Display abiflags data.
2014-07-28 Alan Modra <amodra@gmail.com>
PR 13227
......
......@@ -3167,6 +3167,8 @@ get_mips_segment_type (unsigned long type)
return "RTPROC";
case PT_MIPS_OPTIONS:
return "OPTIONS";
case PT_MIPS_ABIFLAGS:
return "ABIFLAGS";
default:
break;
}
......@@ -3366,6 +3368,7 @@ get_mips_section_type_name (unsigned int sh_type)
case SHT_MIPS_EH_REGION: return "MIPS_EH_REGION";
case SHT_MIPS_XLATE_OLD: return "MIPS_XLATE_OLD";
case SHT_MIPS_PDR_EXCEPTION: return "MIPS_PDR_EXCEPTION";
case SHT_MIPS_ABIFLAGS: return "MIPS_ABIFLAGS";
default:
break;
}
......@@ -11990,6 +11993,41 @@ display_sparc_gnu_attribute (unsigned char * p,
return display_tag_value (tag, p, end);
}
static void
print_mips_fp_abi_value (int val)
{
switch (val)
{
case Val_GNU_MIPS_ABI_FP_ANY:
printf (_("Hard or soft float\n"));
break;
case Val_GNU_MIPS_ABI_FP_DOUBLE:
printf (_("Hard float (double precision)\n"));
break;
case Val_GNU_MIPS_ABI_FP_SINGLE:
printf (_("Hard float (single precision)\n"));
break;
case Val_GNU_MIPS_ABI_FP_SOFT:
printf (_("Soft float\n"));
break;
case Val_GNU_MIPS_ABI_FP_OLD_64:
printf (_("Hard float (MIPS32r2 64-bit FPU 12 callee-saved)\n"));
break;
case Val_GNU_MIPS_ABI_FP_XX:
printf (_("Hard float (32-bit CPU, Any FPU)\n"));
break;
case Val_GNU_MIPS_ABI_FP_64:
printf (_("Hard float (32-bit CPU, 64-bit FPU)\n"));
break;
case Val_GNU_MIPS_ABI_FP_64A:
printf (_("Hard float compat (32-bit CPU, 64-bit FPU)\n"));
break;
default:
printf ("??? (%d)\n", val);
break;
}
}
static unsigned char *
display_mips_gnu_attribute (unsigned char * p,
int tag,
......@@ -12004,27 +12042,8 @@ display_mips_gnu_attribute (unsigned char * p,
p += len;
printf (" Tag_GNU_MIPS_ABI_FP: ");
switch (val)
{
case Val_GNU_MIPS_ABI_FP_ANY:
printf (_("Hard or soft float\n"));
break;
case Val_GNU_MIPS_ABI_FP_DOUBLE:
printf (_("Hard float (double precision)\n"));
break;
case Val_GNU_MIPS_ABI_FP_SINGLE:
printf (_("Hard float (single precision)\n"));
break;
case Val_GNU_MIPS_ABI_FP_SOFT:
printf (_("Soft float\n"));
break;
case Val_GNU_MIPS_ABI_FP_64:
printf (_("Hard float (MIPS32r2 64-bit FPU)\n"));
break;
default:
printf ("??? (%d)\n", val);
break;
}
print_mips_fp_abi_value (val);
return p;
}
......@@ -12627,10 +12646,121 @@ print_mips_pltgot_entry (unsigned char * data, bfd_vma pltgot, bfd_vma addr)
return addr + (is_32bit_elf ? 4 : 8);
}
static void
print_mips_ases (unsigned int mask)
{
if (mask & AFL_ASE_DSP)
fputs ("\n\tDSP ASE", stdout);
if (mask & AFL_ASE_DSPR2)
fputs ("\n\tDSP R2 ASE", stdout);
if (mask & AFL_ASE_EVA)
fputs ("\n\tEnhanced VA Scheme", stdout);
if (mask & AFL_ASE_MCU)
fputs ("\n\tMCU (MicroController) ASE", stdout);
if (mask & AFL_ASE_MDMX)
fputs ("\n\tMDMX ASE", stdout);
if (mask & AFL_ASE_MIPS3D)
fputs ("\n\tMIPS-3D ASE", stdout);
if (mask & AFL_ASE_MT)
fputs ("\n\tMT ASE", stdout);
if (mask & AFL_ASE_SMARTMIPS)
fputs ("\n\tSmartMIPS ASE", stdout);
if (mask & AFL_ASE_VIRT)
fputs ("\n\tVZ ASE", stdout);
if (mask & AFL_ASE_MSA)
fputs ("\n\tMSA ASE", stdout);
if (mask & AFL_ASE_MIPS16)
fputs ("\n\tMIPS16 ASE", stdout);
if (mask & AFL_ASE_MICROMIPS)
fputs ("\n\tMICROMIPS ASE", stdout);
if (mask & AFL_ASE_XPA)
fputs ("\n\tXPA ASE", stdout);
if (mask == 0)
fprintf (stdout, "\n\t%s", _("None"));
}
static void
print_mips_isa_ext (unsigned int isa_ext)
{
switch (isa_ext)
{
case 0:
fputs (_("None"), stdout);
break;
case AFL_EXT_XLR:
fputs ("RMI XLR", stdout);
break;
case AFL_EXT_OCTEON2:
fputs ("Cavium Networks Octeon2", stdout);
break;
case AFL_EXT_OCTEONP:
fputs ("Cavium Networks OcteonP", stdout);
break;
case AFL_EXT_LOONGSON_3A:
fputs ("Loongson 3A", stdout);
break;
case AFL_EXT_OCTEON:
fputs ("Cavium Networks Octeon", stdout);
break;
case AFL_EXT_5900:
fputs ("Toshiba R5900", stdout);
break;
case AFL_EXT_4650:
fputs ("MIPS R4650", stdout);
break;
case AFL_EXT_4010:
fputs ("LSI R4010", stdout);
break;
case AFL_EXT_4100:
fputs ("NEC VR4100", stdout);
break;
case AFL_EXT_3900:
fputs ("Toshiba R3900", stdout);
break;
case AFL_EXT_10000:
fputs ("MIPS R10000", stdout);
break;
case AFL_EXT_SB1:
fputs ("Broadcom SB-1", stdout);
break;
case AFL_EXT_4111:
fputs ("NEC VR4111/VR4181", stdout);
break;
case AFL_EXT_4120:
fputs ("NEC VR4120", stdout);
break;
case AFL_EXT_5400:
fputs ("NEC VR5400", stdout);
break;
case AFL_EXT_5500:
fputs ("NEC VR5500", stdout);
break;
case AFL_EXT_LOONGSON_2E:
fputs ("ST Microelectronics Loongson 2E", stdout);
break;
case AFL_EXT_LOONGSON_2F:
fputs ("ST Microelectronics Loongson 2F", stdout);
break;
default:
fputs (_("Unknown"), stdout);
}
}
static int
get_mips_reg_size (int reg_size)
{
return (reg_size == AFL_REG_NONE) ? 0
: (reg_size == AFL_REG_32) ? 32
: (reg_size == AFL_REG_64) ? 64
: (reg_size == AFL_REG_128) ? 128
: -1;
}
static int
process_mips_specific (FILE * file)
{
Elf_Internal_Dyn * entry;
Elf_Internal_Shdr *sect = NULL;
size_t liblist_offset = 0;
size_t liblistno = 0;
size_t conflictsno = 0;
......@@ -12648,6 +12778,57 @@ process_mips_specific (FILE * file)
process_attributes (file, NULL, SHT_GNU_ATTRIBUTES, NULL,
display_mips_gnu_attribute);
sect = find_section (".MIPS.abiflags");
if (sect != NULL)
{
Elf_External_ABIFlags_v0 *abiflags_ext;
Elf_Internal_ABIFlags_v0 abiflags_in;
if (sizeof (Elf_External_ABIFlags_v0) != sect->sh_size)
fputs ("\nCorrupt ABI Flags section.\n", stdout);
else
{
abiflags_ext = get_data (NULL, file, sect->sh_offset, 1,
sect->sh_size, _("MIPS ABI Flags section"));
if (abiflags_ext)
{
abiflags_in.version = BYTE_GET (abiflags_ext->version);
abiflags_in.isa_level = BYTE_GET (abiflags_ext->isa_level);
abiflags_in.isa_rev = BYTE_GET (abiflags_ext->isa_rev);
abiflags_in.gpr_size = BYTE_GET (abiflags_ext->gpr_size);
abiflags_in.cpr1_size = BYTE_GET (abiflags_ext->cpr1_size);
abiflags_in.cpr2_size = BYTE_GET (abiflags_ext->cpr2_size);
abiflags_in.fp_abi = BYTE_GET (abiflags_ext->fp_abi);
abiflags_in.isa_ext = BYTE_GET (abiflags_ext->isa_ext);
abiflags_in.ases = BYTE_GET (abiflags_ext->ases);
abiflags_in.flags1 = BYTE_GET (abiflags_ext->flags1);
abiflags_in.flags2 = BYTE_GET (abiflags_ext->flags2);
printf ("\nMIPS ABI Flags Version: %d\n", abiflags_in.version);
printf ("\nISA: MIPS%d", abiflags_in.isa_level);
if (abiflags_in.isa_rev > 1)
printf ("r%d", abiflags_in.isa_rev);
printf ("\nGPR size: %d",
get_mips_reg_size (abiflags_in.gpr_size));
printf ("\nCPR1 size: %d",
get_mips_reg_size (abiflags_in.cpr1_size));
printf ("\nCPR2 size: %d",
get_mips_reg_size (abiflags_in.cpr2_size));
fputs ("\nFP ABI: ", stdout);
print_mips_fp_abi_value (abiflags_in.fp_abi);
fputs ("ISA Extension: ", stdout);
print_mips_isa_ext (abiflags_in.isa_ext);
fputs ("\nASEs:", stdout);
print_mips_ases (abiflags_in.ases);
printf ("\nFLAGS 1: %8.8lx", abiflags_in.flags1);
printf ("\nFLAGS 2: %8.8lx", abiflags_in.flags2);
fputc ('\n', stdout);
free (abiflags_ext);
}
}
}
/* We have a lot of special sections. Thanks SGI! */
if (dynamic_section == NULL)
/* No information available. */
......@@ -12787,11 +12968,11 @@ process_mips_specific (FILE * file)
if (options_offset != 0)
{
Elf_External_Options * eopt;
Elf_Internal_Shdr * sect = section_headers;
Elf_Internal_Options * iopt;
Elf_Internal_Options * option;
size_t offset;
int cnt;
sect = section_headers;
/* Find the section header so that we get the size. */
while (sect->sh_type != SHT_MIPS_OPTIONS)
......
2014-07-29 Matthew Fortune <matthew.fortune@imgtec.com>
* binutils-all/readelf.s: Account for .MIPS.abiflags and
.gnu.attributes.
* binutils-all/readelf.ss-tmips: Likewise.
* binutils-all/strip-3.d: Likewise.
2014-07-10 Will Newton <will.newton@linaro.org>
* binutils-all/objcopy.exp: Disable the strip-10 test on
......
......@@ -6,16 +6,16 @@ Section Headers:
# On the normal MIPS systems, sections must be aligned to 16 byte
# boundaries. On IA64, text sections are aligned to 16 byte boundaries.
+\[ 1\] .text +PROGBITS +00000000 0000(34|40) 0000(08|10) 00 +AX +0 +0 +(.|..)
+\[ 2\] .rel.+text +REL. +0+ 0+.* 0000.. 0. +I +. +1 +4
+\[ 2\] .rel.+text +REL. +0+ 0+.* 0000.. 0. +I +.+ +1 +4
# MIPS targets put .rela.text here.
#...
+\[ .\] .data +PROGBITS +00000000 0000(3c|48|50) 0000(04|10) 00 +WA +0 +0 +(.|..)
+\[ .\] .bss +NOBITS +00000000 0000(40|4c|60) 000000 00 +WA +0 +0 +(.|..)
# MIPS targets put .reginfo and .mdebug here.
# MIPS targets put .reginfo, .mdebug, .MIPS.abiflags and .gnu.attributes here.
# v850 targets put .call_table_data and .call_table_text here.
#...
+\[ .\] .shstrtab +STRTAB +00000000 0+.* 0+.* 00 +0 +0 +.
+\[ .\] .symtab +SYMTAB +00000000 0+.* 0+.* 10 +.. +. +4
+\[..\] .symtab +SYMTAB +00000000 0+.* 0+.* 10 +.. +.+ +4
+\[..\] .strtab +STRTAB +00000000 0+.* 0+.* 00 +0 +0 +1
Key to Flags:
#...
Symbol table '.symtab' contains 12 entries:
Symbol table '.symtab' contains 14 entries:
+Num: +Value +Size +Type +Bind +Vis +Ndx +Name
+0: 00000000 +0 +NOTYPE +LOCAL +DEFAULT +UND
+1: 00000000 +0 +SECTION +LOCAL +DEFAULT +1
......@@ -9,7 +9,9 @@ Symbol table '.symtab' contains 12 entries:
+5: 00000000 +0 +NOTYPE +LOCAL +DEFAULT +3 static_data_symbol
+6: 00000000 +0 +SECTION +LOCAL +DEFAULT +5
+7: 00000000 +0 +SECTION +LOCAL +DEFAULT +6
+8: 00000000 +0 +OBJECT +GLOBAL +DEFAULT +1 text_symbol
+9: 00000000 +0 +NOTYPE +GLOBAL +DEFAULT +UND external_symbol
+10: 00000000 +0 +OBJECT +GLOBAL +DEFAULT +3 data_symbol
+11: 00000004 +4 +(COMMON|OBJECT) +GLOBAL +DEFAULT +(PRC|COM) common_symbol
+8: 00000000 +0 +SECTION +LOCAL +DEFAULT +7
+9: 00000000 +0 +SECTION +LOCAL +DEFAULT +8
+10: 00000000 +0 +OBJECT +GLOBAL +DEFAULT +1 text_symbol
+11: 00000000 +0 +NOTYPE +GLOBAL +DEFAULT +UND external_symbol
+12: 00000000 +0 +OBJECT +GLOBAL +DEFAULT +3 data_symbol
+13: 00000004 +4 +(COMMON|OBJECT) +GLOBAL +DEFAULT +(PRC|COM) common_symbol
#PROG: strip
#source: empty.s
#strip: -R .text -R .data -R .bss -R .ARM.attributes -R .reginfo -R .pdr -R .xtensa.info
#strip: -R .text -R .data -R .bss -R .ARM.attributes -R .reginfo -R .gnu.attributes -R .MIPS.abiflags -R .pdr -R .xtensa.info
#readelf: -S --wide
#name: strip empty file
#target: *-*-linux* *-*-gnu*
......
2014-07-29 Matthew Fortune <matthew.fortune@imgtec.com>
* elfcpp.h (PT_MIPS_ABIFLAGS): New program header type.
2014-07-02 Jing Yu <jingyu@google.com>
* aarch64.h: New file. New enums for aarch64-elf64 relocations.
......
......@@ -495,6 +495,8 @@ enum PT
PT_MIPS_RTPROC = 0x70000001,
// .MIPS.options section.
PT_MIPS_OPTIONS = 0x70000002,
// .MIPS.abiflags section.
PT_MIPS_ABIFLAGS = 0x70000003,
// Platform architecture compatibility information
PT_AARCH64_ARCHEXT = 0x70000000,
// Exception unwind tables
......
2014-07-29 Matthew Fortune <matthew.fortune@imgtec.com>
* config/tc-mips.c (mips_flags_frag): New static global.
(struct mips_set_options): Add oddspreg field.
(file_mips_opts, mips_opts): Initialize oddspreg.
(ISA_HAS_ODD_SINGLE_FPR): Add CPU argument and update for R5900 and
Loongson-3a.
(enum options, md_longopts, md_parse_option): Add -mfpxx, -modd-spreg
and -mno-odd-spreg options.
(md_begin): Create .MIPS.abiflags section.
(fpabi_incompatible_with, fpabi_requires): New static function.
(check_fpabi): Likewise.
(mips_check_options): Handle fp=xx and oddspreg restrictions.
(file_mips_check_options): Set oddspreg by default for fp=xx.
(mips_oddfpreg_ok): Re-write function.
(check_regno): Check odd numbered registers regardless of FPR size.
For fp != 32 use as_bad instead of as_warn.
(match_float_constant): Rewrite check regarding FP register width. Add
support for generating constants when MXHC1 is present. Handle fp=xx
to comply with the ABI.
(macro): Update M_LI_DD similarly to match_float_constant. Generate
MTHC1 when available. Check that correct code can be generated for
fp=xx and fp=64 ABIs.
(parse_code_option, s_mipsset): Add fp=xx, oddspreg and nooddspreg
options.
(mips_convert_ase_flags): New static function.
(mips_elf_final_processing): Use fpabi == Val_GNU_MIPS_ABI_FP_OLD_64
to determine when to add the EF_MIPS_FP64 flag. Populate the
.MIPS.abiflags section.
(md_mips_end): Update .gnu_attribute based on command line and .module
as applicable. Use check_fpabi to ensure .gnu.attribute and command
line/.module options are consistent.
* doc/as.texinfo: Add missing -mgp64/-mfp64 options and document new
-mfpxx, -modd-spreg and -mno-odd-spreg options.
* doc/c-mips.texi: Document -mfpxx, -modd-spreg, -mno-odd-spreg,
gnu_attribute values and FP ABIs.
2014-07-27 Joel Sherrill <joel.sherrill@oarcorp.com>
Add RTEMS target support and simplify matching
......
This diff is collapsed.
......@@ -399,6 +399,8 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
[@b{-g}[@var{debug level}]] [@b{-G} @var{num}] [@b{-KPIC}] [@b{-call_shared}]
[@b{-non_shared}] [@b{-xgot} [@b{-mvxworks-pic}]
[@b{-mabi}=@var{ABI}] [@b{-32}] [@b{-n32}] [@b{-64}] [@b{-mfp32}] [@b{-mgp32}]
[@b{-mfp64}] [@b{-mgp64}] [@b{-mfpxx}]
[@b{-modd-spreg}] [@b{-mno-odd-spreg}]
[@b{-march}=@var{CPU}] [@b{-mtune}=@var{CPU}] [@b{-mips1}] [@b{-mips2}]
[@b{-mips3}] [@b{-mips4}] [@b{-mips5}] [@b{-mips32}] [@b{-mips32r2}]
[@b{-mips32r3}] [@b{-mips32r5}] [@b{-mips64}] [@b{-mips64r2}]
......@@ -1321,6 +1323,25 @@ flags force a certain group of registers to be treated as 32 bits wide at
all times. @samp{-mgp32} controls the size of general-purpose registers
and @samp{-mfp32} controls the size of floating-point registers.
@item -mgp64
@itemx -mfp64
The register sizes are normally inferred from the ISA and ABI, but these
flags force a certain group of registers to be treated as 64 bits wide at
all times. @samp{-mgp64} controls the size of general-purpose registers
and @samp{-mfp64} controls the size of floating-point registers.
@item -mfpxx
The register sizes are normally inferred from the ISA and ABI, but using
this flag in combination with @samp{-mabi=32} enables an ABI variant
which will operate correctly with floating-point registers which are
32 or 64 bits wide.
@item -modd-spreg
@itemx -mno-odd-spreg
Enable use of floating-point operations on odd-numbered single-precision
registers when supported by the ISA. @samp{-mfpxx} implies
@samp{-mno-odd-spreg}, otherwise the default is @samp{-modd-spreg}.
@item -mips16
@itemx -no-mips16
Generate code for the MIPS 16 processor. This is equivalent to putting
......
......@@ -28,6 +28,7 @@ Assembly Language Programming'' in the same work.
* MIPS assembly options:: Directives to control code generation
* MIPS autoextend:: Directives for extending MIPS 16 bit instructions
* MIPS insn:: Directive to mark data as an instruction
* MIPS FP ABIs:: Marking which FP ABI is in use
* MIPS NaN Encodings:: Directives to record which NaN encoding is being used
* MIPS Option Stack:: Directives to save and restore options
* MIPS ASE Instruction Generation Overrides:: Directives to control
......@@ -125,6 +126,22 @@ The @code{.set gp=64} and @code{.set fp=64} directives allow the size
of registers to be changed for parts of an object. The default value is
restored by @code{.set gp=default} and @code{.set fp=default}.
@item -mfpxx
Make no assumptions about whether 32-bit or 64-bit floating-point
registers are available. This is provided to support having modules
compatible with either @samp{-mfp32} or @samp{-mfp64}. This option can
only be used with MIPS II and above.
The @code{.set fp=xx} directive allows a part of an object to be marked
as not making assumptions about 32-bit or 64-bit FP registers. The
default value is restored by @code{.set fp=default}.
@item -modd-spreg
@itemx -mno-odd-spreg
Enable use of floating-point operations on odd-numbered single-precision
registers when supported by the ISA. @samp{-mfpxx} implies
@samp{-mno-odd-spreg}, otherwise the default is @samp{-modd-spreg}
@item -mips16
@itemx -no-mips16
Generate code for the MIPS 16 processor. This is equivalent to putting
......@@ -769,6 +786,115 @@ baz:
@end example
@node MIPS FP ABIs
@section Directives to control the FP ABI
@menu
* MIPS FP ABI History:: History of FP ABIs
* MIPS FP ABI Variants:: Supported FP ABIs
* MIPS FP ABI Selection:: Automatic selection of FP ABI
* MIPS FP ABI Compatibility:: Linking different FP ABI variants
@end menu
@node MIPS FP ABI History
@subsection History of FP ABIs
@cindex @code{.gnu_attribute 4, @var{n}} directive, MIPS
@cindex @code{.gnu_attribute Tag_GNU_MIPS_ABI_FP, @var{n}} directive, MIPS
The MIPS ABIs support a variety of different floating-point extensions
where calling-convention and register sizes vary for floating-point data.
The extensions exist to support a wide variety of optional architecture
features. The resulting ABI variants are generally incompatible with each
other and must be tracked carefully.
Traditionally the use of an explicit @code{.gnu_attribute 4, @var{n}}
directive is used to indicate which ABI is in use by a specific module.
It was then left to the user to ensure that command line options and the
selected ABI were compatible with some potential for inconsistencies.
@node MIPS FP ABI Variants
@subsection Supported FP ABIs
The supported floating-point ABI variants are:
@table @code
@item 0 - No floating-point
This variant is used to indicate that floating-point is not used within
the module at all and therefore has no impact on the ABI. This is the
default.
@item 1 - Double-precision
This variant indicates that double-precision support is used. For 64-bit